QUVIVIQ

6 ADVERSE REACTIONS The following are discussed in detail in other sections of the labeling: CNS-Depressant Effects and Daytime Impairment [see Warnings and Precautions (5.1) ] Worsening of Depression/Suicidal Ideation [see Warnings and Precautions (5.2) ] Sleep Paralysis, Hypnagogic/Hypnopompic Hallucinations, and Cataplexy-like Symptoms [see Warnings and Precautions (5.3) ] Complex Sleep Behaviors [see Warnings and Precautions (5.4) ] Patients with Compromised Respiratory Function [see Warnings and Precautions (5.5) ] The most common adverse reactions (reported in ≥ 5% of patients treated with QUVIVIQ and at an incidence ≥ than placebo) were headache and somnolence or fatigue. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Idorsia Pharmaceuticals Ltd at toll-free phone 1-833-400-9611 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in clinical trials of a drug cannot be directly compared to rates in clinical trials of another drug and may not reflect the rates observed in practice. The safety of QUVIVIQ was evaluated in three placebo-controlled clinical studies (two 3-month studies of identical design [Study 1 and Study 2], and a 9-month extension study [Study 3]). Study 1 evaluated 50 mg and 25 mg doses of QUVIVIQ, while Study 2 evaluated a 25 mg dose and a 10 mg dose of QUVIVIQ. The 10 mg dose is not an approved dose. A total of 1232 patients (including approximately 40% elderly patients [≥ 65 years old]), received QUVIVIQ 50 mg (N = 308); 25 mg (N = 618); or 10 mg (an unapproved dose) (N = 306). A total of 576 patients were treated with QUVIVIQ for at least 6 months and 331 for at least 12 months. Most Common Adverse Reactions The most common reported adverse reaction (in at least 5% of patients and greater than placebo) during double-blind treatment in Study 1 was headache. Table 1 shows adverse reactions that occurred in at least 2% of patients treated with QUVIVIQ and more frequently than in patients who received placebo in Study 1. Table 1 Adverse Reactions Reported in ≥ 2% of QUVIVIQ-treated Patients and Greater than in Placebo-treated Patients in a 3-Month Placebo-Controlled Study (Study 1) QUVIVIQ QUVIVIQ Placebo 25 mg 50 mg (N=310) (N=308) (N=309) % % % Nervous System Disorders Headache The following terms were combined: Headache includes: headache, tension headache, migraine, migraine with aura, head discomfort Somnolence or fatigue includes: somnolence, sedation, fatigue, hypersomnia, lethargy Dizziness includes: dizziness, vertigo, labyrinthitis Nausea includes: nausea, vomiting, procedural nausea 6 7 5 Somnolence or fatigue 6 5 4 Dizziness 2 3 2 Gastro-intestinal disorders Nausea 0 3 2 Other Adverse Reactions Observed During Clinical Trials (Study 1 and Study 2) Other adverse reactions of < 2% frequency but greater than placebo are shown below. The following do not include adverse reactions 1) for which a drug cause was remote, 2) that were so general as to be uninformative, or 3) that were not considered to have clinically significant implications. Sleep paralysis was reported in 0.5% and 0.3% of patients receiving QUVIVIQ 25 mg and 50 mg, respectively, compared to no reports for placebo. Hypnagogic and hypnopompic hallucinations were reported in 0.6% of patients receiving QUVIVIQ 25 mg compared to no cases with QUVIVIQ 50 mg or placebo. 6.2 Post-Marketing Experience The following adverse reactions have been identified during post-approval use of QUVIVIQ. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Psychiatric disorders : Abnormal dreams or nightmares Immune system disorders: Hypersensitivity (such as rash, urticaria)

4 CONTRAINDICATIONS QUVIVIQ is contraindicated in patients with narcolepsy. QUVIVIQ is contraindicated in patients with narcolepsy. ( 4 )

11 DESCRIPTION QUVIVIQ contains daridorexant, an orexin receptor antagonist, present as daridorexant hydrochloride salt. The chemical name of daridorexant hydrochloride is (S)-(2-(5-chloro-4-methyl-1H-benzo[d]imidazol-2-yl)-2-methylpyrrolidin-1-yl)(5-methoxy-2-(2H-1,2,3-triazol-2-yl)phenyl)methanone hydrochloride. The molecular formula is C 23 H 23 N 6 O 2 Cl * HCl. The molecular weight is 487.38 g/mol. The structural formula is: Daridorexant hydrochloride is a white to light yellowish powder that is very slightly soluble in water. QUVIVIQ tablets are intended for oral administration. Each film-coated tablet contains daridorexant 25 mg or 50 mg, equivalent to 27 mg or 54 mg of daridorexant hydrochloride, respectively. The inactive ingredients are croscarmellose sodium, magnesium stearate, mannitol, microcrystalline cellulose, povidone, and silicon dioxide. In addition, the film coating contains the following inactive ingredients: glycerin, hypromellose, iron oxide black, iron oxide red, microcrystalline cellulose, talc, titanium dioxide, and, in the 50 mg tablet only, iron oxide yellow. Chemical Structure

2 DOSAGE AND ADMINISTRATION The recommended dosage is 25 mg to 50 mg once per night, taken orally within 30 minutes before going to bed, with at least 7 hours remaining prior to planned awakening. ( 2.1 ) Time to sleep onset may be delayed if taken with or soon after a meal. ( 2.1 ) Hepatic Impairment: ( 2.3 ) Moderate hepatic impairment: Maximum recommended dosage is 25 mg no more than once per night. Severe hepatic impairment: Not recommended. 2.1 Recommended Dosage The recommended dosage range is 25 mg to 50 mg of QUVIVIQ taken orally no more than once per night within 30 minutes of going to bed (with at least 7 hours remaining prior to planned awakening). Time to sleep onset may be delayed if taken with or soon after a meal [see Clinical Pharmacology (12.3) ] . 2.2 Dosage Recommendations for Concomitant Use with CYP3A4 Inhibitors or CYP3A4 Inducers Co-administration with Strong CYP3A4 Inhibitors Avoid concomitant use of QUVIVIQ with strong inhibitors of CYP3A4 [see Drug Interactions (7.1) , Clinical Pharmacology (12.3) ] . Co-administration with Moderate CYP3A4 Inhibitors The recommended dosage of QUVIVIQ is 25 mg no more than once per night when used with moderate inhibitors of CYP3A4 [see Drug Interactions (7.1) , Clinical Pharmacology (12.3) ] . Co-administration with Strong or Moderate CYP3A4 Inducers Avoid concomitant use of QUVIVIQ with strong or moderate CYP3A4 inducers [see Drug Interactions (7.1) ] . 2.3 Dosage Recommendations for Patients with Hepatic Impairment The maximum recommended dosage in patients with moderate hepatic impairment (Child-Pugh score 7–9) is 25 mg of QUVIVIQ no more than once per night [see Use in Specific Populations (8.6) , Clinical Pharmacology (12.3) ] . QUVIVIQ is not recommended in patients with severe hepatic impairment (Child-Pugh score ≥ 10) [see Use in Specific Populations (8.6) ] .

1 INDICATIONS AND USAGE QUVIVIQ is indicated for the treatment of adult patients with insomnia, characterized by difficulties with sleep onset and/or sleep maintenance [see Clinical Studies (14.1) ] . QUVIVIQ is an orexin receptor antagonist indicated for the treatment of adult patients with insomnia, characterized by difficulties with sleep onset and/or sleep maintenance. ( 1 )

9.2 Abuse Drug abuse is the intentional, non-therapeutic use of a drug, even once, for its desirable psychological or physiological effects. The abuse potential of daridorexant was evaluated in preclinical models, recreational sedative drug users, and insomnia subjects. In a human abuse potential study conducted in 63 recreational sedative drug users, the effect of single-dose administration of QUVIVIQ [50 mg, 100 mg (two times the maximum recommended dose), and 150 mg (three times the maximum recommended dose)], zolpidem (30 mg), suvorexant (150 mg), and placebo on subjective rating of "drug liking" was evaluated. At the dose of 50 mg, QUVIVIQ showed significantly lower "drug liking" ratings than zolpidem (30 mg) and suvorexant (150 mg), but significantly higher than placebo. At doses of 100 mg (two times the maximum recommended dose) and 150 mg (three times the maximum recommended dose), QUVIVIQ showed similar "drug liking" ratings to zolpidem (30 mg) and suvorexant (150 mg). In placebo-controlled Phase 3 clinical studies in which 1232 subjects with insomnia were treated with QUVIVIQ for up to 12 months, there were no reports indicative of abuse liability. Because individuals with a history of abuse of or addiction to alcohol or other drugs may be at increased risk for abuse of or addiction to QUVIVIQ, follow such patients carefully.

9.1 Controlled Substance QUVIVIQ contains daridorexant, a Schedule IV controlled substance.

9.3 Dependence Physical dependence is a state that develops as a result of physiological adaptation in response to repeated drug use, manifested by withdrawal signs and symptoms upon abrupt treatment discontinuation or a significant dose reduction of a drug. In animal studies and clinical trials evaluating physical dependence, chronic administration of daridorexant did not produce withdrawal signs or symptoms upon drug discontinuation. This suggests that daridorexant does not produce physical dependence.

9 DRUG ABUSE AND DEPENDENCE 9.1 Controlled Substance QUVIVIQ contains daridorexant, a Schedule IV controlled substance. 9.2 Abuse Drug abuse is the intentional, non-therapeutic use of a drug, even once, for its desirable psychological or physiological effects. The abuse potential of daridorexant was evaluated in preclinical models, recreational sedative drug users, and insomnia subjects. In a human abuse potential study conducted in 63 recreational sedative drug users, the effect of single-dose administration of QUVIVIQ [50 mg, 100 mg (two times the maximum recommended dose), and 150 mg (three times the maximum recommended dose)], zolpidem (30 mg), suvorexant (150 mg), and placebo on subjective rating of "drug liking" was evaluated. At the dose of 50 mg, QUVIVIQ showed significantly lower "drug liking" ratings than zolpidem (30 mg) and suvorexant (150 mg), but significantly higher than placebo. At doses of 100 mg (two times the maximum recommended dose) and 150 mg (three times the maximum recommended dose), QUVIVIQ showed similar "drug liking" ratings to zolpidem (30 mg) and suvorexant (150 mg). In placebo-controlled Phase 3 clinical studies in which 1232 subjects with insomnia were treated with QUVIVIQ for up to 12 months, there were no reports indicative of abuse liability. Because individuals with a history of abuse of or addiction to alcohol or other drugs may be at increased risk for abuse of or addiction to QUVIVIQ, follow such patients carefully. 9.3 Dependence Physical dependence is a state that develops as a result of physiological adaptation in response to repeated drug use, manifested by withdrawal signs and symptoms upon abrupt treatment discontinuation or a significant dose reduction of a drug. In animal studies and clinical trials evaluating physical dependence, chronic administration of daridorexant did not produce withdrawal signs or symptoms upon drug discontinuation. This suggests that daridorexant does not produce physical dependence.

10 OVERDOSAGE There is limited clinical experience with QUVIVIQ overdose. In clinical pharmacology studies, healthy subjects were administered single doses of up to 200 mg (4 times the maximum recommended dose) of QUVIVIQ. The following adverse reactions were observed: somnolence, muscle weakness, cataplexy-like symptoms, sleep paralysis, disturbance in attention, fatigue, headache, and constipation. There is no specific antidote to an overdosage of QUVIVIQ. In the event of an overdose, general symptomatic and supportive medical care, along with immediate gastric lavage where appropriate, should be provided and patients should be carefully monitored. Dialysis is unlikely to be effective as daridorexant is highly protein bound. Consult a Certified Poison Control Center for the most up to date information on the management of overdosage (1-800-222-1222 or www.poison.org).

7 DRUG INTERACTIONS Strong CYP3A4 inhibitors: Avoid concomitant use. ( 2.2 , 7.1 ) Moderate CYP3A4 inhibitors: Maximum recommended dose is 25 mg. ( 2.2 , 7.1 ) Moderate or Strong CYP3A4 inducers: Avoid concomitant use. ( 7.1 ) 7.1 Drugs Having Clinically Important Interactions with QUVIVIQ Table 2 Clinically Important Drug Interactions with QUVIVIQ Strong or Moderate CYP3A4 Inhibitors Clinical Implications: Concomitant use with a strong or moderate CYP3A4 inhibitor increases exposure to daridorexant [see Clinical Pharmacology (12.3) ] , which may increase the risk of QUVIVIQ adverse reactions. Prevention or Management: The recommended dose of QUVIVIQ is 25 mg when used with a moderate CYP3A4 inhibitor [see Dosage and Administration (2.2) ] . Concomitant use of QUVIVIQ with a strong inhibitor of CYP3A4 is not recommended [see Dosage and Administration (2.2) ] . Strong and Moderate CYP3A4 Inducers Clinical Implications: Concomitant use with a strong or moderate CYP3A4 inducer decreases exposure to daridorexant [see Clinical Pharmacology (12.3) ] , which may reduce the efficacy of QUVIVIQ. Prevention or Management: Concomitant use of QUVIVIQ with a strong or moderate inducer of CYP3A4 is not recommended [see Dosage and Administration (2.2) ] . Alcohol and Other CNS Depressants Clinical Implications: Concomitant use of alcohol or other CNS depressants with QUVIVIQ may lead to additive impairment of psychomotor performance and risk of CNS depression [see Clinical Pharmacology (12.2) ] . Prevention or Management: Avoid alcohol consumption with QUVIVIQ [see Warnings and Precautions (5.1) ] . Use with caution in patients receiving CNS depressants. Consider dose adjustment of QUVIVIQ and/or the CNS depressant(s) if used concomitantly [see Warnings and Precautions (5.1) ] .

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action The mechanism of action of daridorexant in the treatment of insomnia is presumed to be through antagonism of orexin receptors. The orexin neuropeptide signaling system plays a role in wakefulness. Blocking the binding of wake-promoting neuropeptides orexin A and orexin B to receptors OX1R and OX2R is thought to suppress wake drive. 12.2 Pharmacodynamics Daridorexant binds to and inhibits the orexin receptors OX1R and OX2R (Ki = 0.47 and 0.93 nM, respectively). Cardiac Electrophysiology At a dose 4 times the maximum recommended dose, QUVIVIQ does not prolong the QTc interval to any clinically relevant extent. Alcohol Co-administration of a single 50 mg dose of QUVIVIQ with alcohol at a blood level of 0.6 g/L led to additive effects on impairment of psychomotor performance (postural stability and alertness). Daridorexant did not affect alcohol concentrations and alcohol did not affect daridorexant concentrations [see Warnings and Precautions (5.1 , 5.4) , Drug Interactions (7.1) ] . Citalopram No clinically significant effect on psychomotor performance was observed when 50 mg QUVIVIQ was co-administered with 20 mg citalopram in healthy subjects at steady state. 12.3 Pharmacokinetics Daridorexant plasma exposure is dose proportional from 25 mg to 50 mg. The daridorexant pharmacokinetic profile is similar following multiple-dose and single-dose administration with no accumulation. Absorption Daridorexant reaches peak plasma concentrations within 1–2 hours (T max ). Daridorexant has an absolute bioavailability of 62%. Effect of food In healthy subjects, a high-fat and high-calorie meal delayed the T max by 1.3 hours and decreased the C max by 16%, but did not affect the total exposure (AUC). Distribution Daridorexant has a volume of distribution of 31 L. Daridorexant is 99.7% bound to plasma proteins. The blood to plasma ratio is 0.64. Elimination The terminal half-life of daridorexant is approximately 8 hours. Metabolism Daridorexant undergoes extensive metabolism and is primarily metabolized by CYP3A4 (89%). Other CYP enzymes individually contribute to less than 3% of metabolic clearance of daridorexant. Excretion The primary route of daridorexant excretion is via feces (approximately 57%), followed by urine (approximately 28%), primarily as metabolites. Trace amounts of parent drug were found in feces and urine. Specific Populations Age, sex, race (White, Black, Asian), body size, and mild to severe renal impairment (Cockcroft-Gault < 30 mL/min, not on dialysis) did not have a clinically significant effect on the pharmacokinetics of daridorexant. The effect of severe hepatic impairment (Child-Pugh score ≥ 10) on the pharmacokinetics of daridorexant has not been studied. Effects of hepatic impairment and renal impairment on the exposure to daridorexant are summarized in Figure 1. Figure 1 Effects of hepatic impairment and renal impairment on daridorexant PK Daridorexant dose: 25 mg. Data are GMRs and 90% CIs. Hepatic impairment PK variables are based on the unbound fraction of daridorexant. Reference = matched healthy subjects. AUC = area under the plasma concentration-time curve from zero to infinity; CI = confidence interval; C max = maximum plasma concentration; GMR = geometric mean ratio; PK = pharmacokinetics. Figure 1 Drug Interaction Studies The effects of other compounds on the exposure to daridorexant are summarized in Figure 2. The effects of daridorexant on the exposure to other compounds are summarized in Figure 3. Effect of Other Compounds on QUVIVIQ Figure 2 Effect of co-administered compounds on the PK of daridorexant Daridorexant 50 mg was administered with interacting drugs, except with diltiazem (25 mg daridorexant). Interacting drugs were administered in multiple-dose fashion, except famotidine (single dose) and alcohol (5 h infusion at 0.6 g/L). Based on PBPK analysis: Concomitant use of itraconazole (a strong CYP3A4 inhibitor) increased daridorexant AUC by more than 400%. Concomitant use of rifampin (a strong CYP3A4 inducer) decreased daridorexant AUC by more than 50%. Data are GMRs and 90% CIs. Some 90% CIs are too narrow to be shown. AUC = area under the plasma concentration-time curve; CI = confidence interval; C max = maximum plasma concentration; GMR = geometric mean ratio; SSRI = selective serotonin reuptake inhibitor. Figure 2 Effect of QUVIVIQ on Other Compounds Figure 3 Effect of daridorexant on the PK of other compounds Single- and multiple-dose (on Day 4) daridorexant 25 mg administered in studies with midazolam and rosuvastatin (only multiple dose). Single-dose daridorexant 50 mg administered in study with citalopram (citalopram at steady state). Data are GMRs and 90% CIs. AUC = area under the plasma concentration-time curve. CI = confidence interval. C max = maximum plasma concentration. GMR = geometric mean ratio. SSRI = selective serotonin reuptake inhibitor. Figure 3

12.1 Mechanism of Action The mechanism of action of daridorexant in the treatment of insomnia is presumed to be through antagonism of orexin receptors. The orexin neuropeptide signaling system plays a role in wakefulness. Blocking the binding of wake-promoting neuropeptides orexin A and orexin B to receptors OX1R and OX2R is thought to suppress wake drive.

12.2 Pharmacodynamics Daridorexant binds to and inhibits the orexin receptors OX1R and OX2R (Ki = 0.47 and 0.93 nM, respectively). Cardiac Electrophysiology At a dose 4 times the maximum recommended dose, QUVIVIQ does not prolong the QTc interval to any clinically relevant extent. Alcohol Co-administration of a single 50 mg dose of QUVIVIQ with alcohol at a blood level of 0.6 g/L led to additive effects on impairment of psychomotor performance (postural stability and alertness). Daridorexant did not affect alcohol concentrations and alcohol did not affect daridorexant concentrations [see Warnings and Precautions (5.1 , 5.4) , Drug Interactions (7.1) ] . Citalopram No clinically significant effect on psychomotor performance was observed when 50 mg QUVIVIQ was co-administered with 20 mg citalopram in healthy subjects at steady state.

12.3 Pharmacokinetics Daridorexant plasma exposure is dose proportional from 25 mg to 50 mg. The daridorexant pharmacokinetic profile is similar following multiple-dose and single-dose administration with no accumulation. Absorption Daridorexant reaches peak plasma concentrations within 1–2 hours (T max ). Daridorexant has an absolute bioavailability of 62%. Effect of food In healthy subjects, a high-fat and high-calorie meal delayed the T max by 1.3 hours and decreased the C max by 16%, but did not affect the total exposure (AUC). Distribution Daridorexant has a volume of distribution of 31 L. Daridorexant is 99.7% bound to plasma proteins. The blood to plasma ratio is 0.64. Elimination The terminal half-life of daridorexant is approximately 8 hours. Metabolism Daridorexant undergoes extensive metabolism and is primarily metabolized by CYP3A4 (89%). Other CYP enzymes individually contribute to less than 3% of metabolic clearance of daridorexant. Excretion The primary route of daridorexant excretion is via feces (approximately 57%), followed by urine (approximately 28%), primarily as metabolites. Trace amounts of parent drug were found in feces and urine. Specific Populations Age, sex, race (White, Black, Asian), body size, and mild to severe renal impairment (Cockcroft-Gault < 30 mL/min, not on dialysis) did not have a clinically significant effect on the pharmacokinetics of daridorexant. The effect of severe hepatic impairment (Child-Pugh score ≥ 10) on the pharmacokinetics of daridorexant has not been studied. Effects of hepatic impairment and renal impairment on the exposure to daridorexant are summarized in Figure 1. Figure 1 Effects of hepatic impairment and renal impairment on daridorexant PK Daridorexant dose: 25 mg. Data are GMRs and 90% CIs. Hepatic impairment PK variables are based on the unbound fraction of daridorexant. Reference = matched healthy subjects. AUC = area under the plasma concentration-time curve from zero to infinity; CI = confidence interval; C max = maximum plasma concentration; GMR = geometric mean ratio; PK = pharmacokinetics. Figure 1 Drug Interaction Studies The effects of other compounds on the exposure to daridorexant are summarized in Figure 2. The effects of daridorexant on the exposure to other compounds are summarized in Figure 3. Effect of Other Compounds on QUVIVIQ Figure 2 Effect of co-administered compounds on the PK of daridorexant Daridorexant 50 mg was administered with interacting drugs, except with diltiazem (25 mg daridorexant). Interacting drugs were administered in multiple-dose fashion, except famotidine (single dose) and alcohol (5 h infusion at 0.6 g/L). Based on PBPK analysis: Concomitant use of itraconazole (a strong CYP3A4 inhibitor) increased daridorexant AUC by more than 400%. Concomitant use of rifampin (a strong CYP3A4 inducer) decreased daridorexant AUC by more than 50%. Data are GMRs and 90% CIs. Some 90% CIs are too narrow to be shown. AUC = area under the plasma concentration-time curve; CI = confidence interval; C max = maximum plasma concentration; GMR = geometric mean ratio; SSRI = selective serotonin reuptake inhibitor. Figure 2 Effect of QUVIVIQ on Other Compounds Figure 3 Effect of daridorexant on the PK of other compounds Single- and multiple-dose (on Day 4) daridorexant 25 mg administered in studies with midazolam and rosuvastatin (only multiple dose). Single-dose daridorexant 50 mg administered in study with citalopram (citalopram at steady state). Data are GMRs and 90% CIs. AUC = area under the plasma concentration-time curve. CI = confidence interval. C max = maximum plasma concentration. GMR = geometric mean ratio. SSRI = selective serotonin reuptake inhibitor. Figure 3

20230516

10

3 DOSAGE FORMS AND STRENGTHS QUVIVIQ (daridorexant) tablets are available as: 25 mg: light purple, arc-triangle shaped, film-coated tablet debossed with "25" on one side and "i" (Idorsia logo) on the other side, containing 25 mg daridorexant. 50 mg: light orange, arc-triangle shaped, film-coated tablet debossed with "50" on one side and "i" (Idorsia logo) on the other side, containing 50 mg daridorexant. Tablets: 25 mg, 50 mg. ( 3 )

QUVIVIQ Daridorexant daridorexant daridorexant Mannitol MICROCRYSTALLINE CELLULOSE 101 Povidone K30 WATER Silicon dioxide Magnesium stearate MICROCRYSTALLINE CELLULOSE 102 HYPROMELLOSE, UNSPECIFIED GLYCERIN Talc Titanium dioxide FERRIC OXIDE RED FERROSOFERRIC OXIDE Light purple arc-triangle 25;i QUVIVIQ Daridorexant daridorexant daridorexant Mannitol MICROCRYSTALLINE CELLULOSE 101 Povidone K30 WATER Silicon dioxide Magnesium stearate MICROCRYSTALLINE CELLULOSE 102 HYPROMELLOSE, UNSPECIFIED GLYCERIN Talc Titanium dioxide FERRIC OXIDE RED FERROSOFERRIC OXIDE FERRIC OXIDE YELLOW Light orange arc-triangle 50;i

13.2 Animal Toxicology and/or Pharmacology In dogs, daily oral administration of daridorexant at ≥ 30 mg/kg/day resulted in behavior characteristic of cataplexy when presented with positive stimulation. The no-observed-effect level (NOEL) for cataplexy is 20 mg/kg/day, which is approximately 3 times the MRHD of 50 mg, based on C max and AUC.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis Daridorexant did not increase the incidence of tumors in rats treated for 2 years at oral doses of 15, 50, and 150 mg/kg/day. The high dose of 150 mg/kg/day is approximately 4 times the MRHD of 50 mg, based on AUC. Daridorexant did not increase the incidence of tumors in Tg.rasH2 mice treated for 26 weeks at oral doses of 100, 300, and 1000 mg/kg/day in males or 100, 200, and 1000 mg/kg/day in females. Mutagenesis Daridorexant was not mutagenic in the in vitro bacterial reverse mutation (Ames) assay or in the in vitro mammalian chromosome aberration assay in human lymphocytes and was not clastogenic in the in vivo rat micronucleus assay. Impairment of Fertility Daridorexant was orally administered to female rats at doses of 30, 100, and 300 mg/kg/day prior to and throughout mating and continuing to gestation Day 6. These doses are approximately 0.5, 3, and 9 times the MRHD of 50 mg, based on AUC. Daridorexant increased pre-implantation loss and decreased implantation sites without affecting mating or fertility at 300 mg/kg/day. The NOAEL for female fertility is 100 mg/kg/day, which is approximately 3 times the MRHD of 50 mg, based on AUC. Daridorexant did not affect fertility when orally administered to male rats at doses of 50, 150, and 450 mg/kg/day prior to and throughout mating. These doses are approximately 1, 3, and 7 times the MRHD of 50 mg, based on AUC.

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis Daridorexant did not increase the incidence of tumors in rats treated for 2 years at oral doses of 15, 50, and 150 mg/kg/day. The high dose of 150 mg/kg/day is approximately 4 times the MRHD of 50 mg, based on AUC. Daridorexant did not increase the incidence of tumors in Tg.rasH2 mice treated for 26 weeks at oral doses of 100, 300, and 1000 mg/kg/day in males or 100, 200, and 1000 mg/kg/day in females. Mutagenesis Daridorexant was not mutagenic in the in vitro bacterial reverse mutation (Ames) assay or in the in vitro mammalian chromosome aberration assay in human lymphocytes and was not clastogenic in the in vivo rat micronucleus assay. Impairment of Fertility Daridorexant was orally administered to female rats at doses of 30, 100, and 300 mg/kg/day prior to and throughout mating and continuing to gestation Day 6. These doses are approximately 0.5, 3, and 9 times the MRHD of 50 mg, based on AUC. Daridorexant increased pre-implantation loss and decreased implantation sites without affecting mating or fertility at 300 mg/kg/day. The NOAEL for female fertility is 100 mg/kg/day, which is approximately 3 times the MRHD of 50 mg, based on AUC. Daridorexant did not affect fertility when orally administered to male rats at doses of 50, 150, and 450 mg/kg/day prior to and throughout mating. These doses are approximately 1, 3, and 7 times the MRHD of 50 mg, based on AUC. 13.2 Animal Toxicology and/or Pharmacology In dogs, daily oral administration of daridorexant at ≥ 30 mg/kg/day resulted in behavior characteristic of cataplexy when presented with positive stimulation. The no-observed-effect level (NOEL) for cataplexy is 20 mg/kg/day, which is approximately 3 times the MRHD of 50 mg, based on C max and AUC.

NDA214985

QUVIVIQ

Daridorexant

80491-7825

HUMAN PRESCRIPTION DRUG

ORAL

PRINCIPAL DISPLAY PANEL - 25 mg Tablet Bottle Carton NDC 80491-7825-3 QUVIVIQ ® (daridorexant) tablets 25 mg CIV Rx only For oral use 30 tablets Dispense the accompanying Medication Guide to each patient. idorsia PRINCIPAL DISPLAY PANEL - 25 mg Tablet Bottle Carton

Distributed by: Idorsia Pharmaceuticals US Inc. One Radnor Corporate Center, Suite 101 100 Matsonford Rd Radnor, PA 19087 IDRS04202023 Patent: www.idorsia.com/patents

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Medication Guide). Administration Instructions Advise patients to take QUVIVIQ only in the evening within 30 minutes before going to bed and only if they can stay in bed for a full night (at least 7 hours) before being active again [see Dosage and Administration (2.1) ] . Advise patients that the effect of QUVIVIQ may be delayed if taken with or soon after a meal [see Dosage and Administration (2.1) , Clinical Pharmacology (12.3) ] . CNS-Depressant Effects and Daytime Impairment Advise patients that QUVIVIQ can impair daytime wakefulness even when used as prescribed. The risk of daytime impairment is increased if QUVIVIQ is taken with less than a full night of sleep remaining or if a higher than recommended dose is taken. If QUVIVIQ is taken in these circumstances, caution patients against driving and other activities requiring complete mental alertness. Advise patients that increased drowsiness may increase the risk of falls in some patients [see Warnings and Precautions (5.1) , Clinical Studies (14.2) ] . Worsening of Depression/Suicidal Ideation Tell patients to report any worsening of depression or suicidal thoughts immediately [see Warnings and Precautions (5.2) ] . Sleep Paralysis, Hypnagogic/Hypnopompic Hallucinations, and Cataplexy-Like Symptoms Advise patients and their families that QUVIVIQ may cause sleep paralysis, which is an inability to move or speak for several minutes during sleep-wake transitions and hypnagogic/hypnopompic hallucinations, including vivid and disturbing perceptions. Symptoms similar to mild cataplexy have occurred with orexin receptor antagonists [see Warnings and Precautions (5.3) ] . Complex Sleep Behaviors Instruct patients and their families that hypnotics may cause complex sleep behaviors, including sleepwalking, sleep driving, preparing and eating food, making phone calls, or having sex while not being fully awake. Tell patients to discontinue QUVIVIQ and notify their healthcare provider immediately if they develop any of these symptoms [see Warnings and Precautions (5.4) ] . Concomitant Medications Ask patients about alcohol consumption, medicines they are taking, and drugs they may be taking without a prescription. Advise patients to avoid consuming alcohol with QUVIVIQ [see Warnings and Precautions (5.1) , Drug Interactions (7.1) , Clinical Pharmacology (12.2) ] . Pregnancy Advise patients that there is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to QUVIVIQ during pregnancy [see Use in Specific Populations (8.1) ] . Tolerance, Abuse, and Dependence Tell patients not to increase the dose of QUVIVIQ on their own, and to inform you if they believe the drug "does not work" [see Drug Abuse and Dependence (9) ] .

MEDICATION GUIDE QUVIVIQ ® (cue-VIH-vick) (daridorexant) tablets, for oral use, CIV This Medication Guide has been approved by the U.S. Food and Drug Administration. Issued: 03/2023 What is the most important information I should know about QUVIVIQ? QUVIVIQ may cause serious side effects, including: Decreased awareness and alertness. The morning after you take QUVIVIQ, your ability to drive safely and think clearly may be decreased. You may also have sleepiness during the day. Do not take more QUVIVIQ than prescribed. Do not take QUVIVIQ unless you are able to stay in bed for a full night (at least 7 hours) before you must be active again. Take QUVIVIQ in the evening within 30 minutes before going to bed. See " What are the possible side effects of QUVIVIQ? " for more information about side effects. What is QUVIVIQ? QUVIVIQ is a prescription medicine for adults who have trouble falling asleep or staying asleep (insomnia). It is not known if QUVIVIQ is safe and effective for use in children. QUVIVIQ is a federally controlled substance (CIV) because it can be abused or lead to dependence. Keep QUVIVIQ in a safe place to prevent misuse and abuse. Selling or giving away QUVIVIQ may harm others and is against the law. Who should not take QUVIVIQ? Do not take QUVIVIQ if you fall asleep often at unexpected times (narcolepsy). Before taking QUVIVIQ, tell your healthcare provider about all of your medical conditions, including if you: have a history of depression, mental illness, or suicidal thoughts or actions have a history of drug or alcohol abuse or addiction have a history of a sudden onset of muscle weakness (cataplexy) have a history of daytime sleepiness have lung or breathing problems, including sleep apnea have liver problems are pregnant or plan to become pregnant. It is not known if QUVIVIQ can harm your unborn baby. Pregnancy Registry : There is a pregnancy registry for women who are exposed to QUVIVIQ during pregnancy. The purpose of this registry is to collect information about the health of you and your baby. For more information or to participate in the registry, call 1-833-400-9611. Talk with your healthcare provider about the risk to your unborn baby if you take QUVIVIQ during pregnancy. are breastfeeding or plan to breastfeed. It is not known if QUVIVIQ passes into your breast milk. Talk to your healthcare provider about the best way to feed your baby during treatment with QUVIVIQ. Tell your healthcare provider about all of the medicines you take , including prescription and over-the-counter medicines, vitamins, and herbal supplements. Taking QUVIVIQ with certain medicines can cause serious side effects. QUVIVIQ may affect the way other medicines work and other medicines may affect the way QUVIVIQ works. Do not take QUVIVIQ with other medicines that can make you sleepy unless your healthcare provider tells you to. Know the medicines you take. Keep a list of them to show your healthcare provider and pharmacist when you get a new medicine. How should I take QUVIVIQ? Take QUVIVIQ exactly as your healthcare provider tells you to take it. Do not change your dose of QUVIVIQ without first talking to your healthcare provider. Take QUVIVIQ one time each night , within 30 minutes before going to bed. Only take QUVIVIQ when you can stay in bed for a full night (at least 7 hours). QUVIVIQ may take longer to work if you take it with or right after a meal. Call your healthcare provider if your insomnia (sleep problem) worsens or is not improved within 7 to 10 days. This may mean that there is another condition causing your sleep problem. If you take too much QUVIVIQ, call your healthcare provider or go to the nearest hospital emergency room right away. What should I avoid while taking QUVIVIQ? Do not drink alcohol while taking QUVIVIQ. It can increase the effects of alcohol, which can be dangerous. You may still feel drowsy the next day after taking QUVIVIQ. Do not drive, operate heavy machinery, do anything dangerous, or do other activities that require clear thinking if you have taken QUVIVIQ as prescribed but do not feel fully awake, you have taken QUVIVIQ and have had less than a full night of sleep (at least 7 hours), or if you have taken more QUVIVIQ than prescribed by your healthcare provider. What are the possible side effects of QUVIVIQ? QUVIVIQ may cause serious side effects, including: See " What is the most important information I should know about QUVIVIQ? " Worsening depression and suicidal thoughts. Call your healthcare provider right away if you have any worsening depression or thoughts of suicide or dying. Temporary inability to move or talk (sleep paralysis) for up to several minutes, or hallucinations while you are going to sleep or waking up. Complex sleep behaviors such as sleepwalking, sleep driving, preparing and eating food, making phone calls, having sex or doing other activities while not fully awake that you may not remember the next morning. Stop taking QUVIVIQ and call your healthcare provider right away if you experience a complex sleep behavior. The most common side effects of QUVIVIQ include headache and sleepiness. These are not all of the possible side effects of QUVIVIQ. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. How should I store QUVIVIQ? Store QUVIVIQ at room temperature between 68°F to 77°F (20°C to 25°C). Keep QUVIVIQ and all medicines out of the reach of children. General information about the safe and effective use of QUVIVIQ. Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use QUVIVIQ for a condition for which it was not prescribed. Do not give QUVIVIQ to other people, even if they have the same symptoms that you have. It may harm them. You can ask your healthcare provider or pharmacist for information about QUVIVIQ that is written for healthcare professionals. What are the ingredients in QUVIVIQ? Active ingredient : daridorexant hydrochloride Inactive ingredients : croscarmellose sodium, magnesium stearate, mannitol, microcrystalline cellulose, povidone, and silicon dioxide. The tablet film coating contains: glycerin, hypromellose, iron oxide black, iron oxide red, microcrystalline cellulose, talc, titanium dioxide, and, in the 50 mg tablet only, iron oxide yellow. Distributed by: Idorsia Pharmaceuticals US Inc. One Radnor Corporate Center, Suite 101 100 Matsonford Rd Radnor, PA 19087 For more information go to QUVIVIQ.com or call 1-833-400-9611.

14 CLINICAL STUDIES 14.1 Controlled Clinical Studies The efficacy of QUVIVIQ was evaluated in two multicenter, randomized, double-blind, placebo-controlled, parallel-group studies, Study 1 (NCT03545191) and Study 2 (NCT03575104). A total of 1854 patients with Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5 ® ) insomnia were randomized to receive QUVIVIQ or placebo once daily, in the evening, for 3 months. Study 1 randomized 930 subjects to QUVIVIQ 50 mg (N = 310), 25 mg (N = 310) or placebo (N = 310). Study 2 randomized 924 subjects to QUVIVIQ 25 mg (N = 309), 10 mg (N = 307), or placebo (N = 308). The 10 mg dose is not an approved dose. At the end of the 3-month treatment period, both studies included a 7-day placebo run-out period, after which patients could enter a 9-month, double-blind, placebo-controlled extension study (Study 3, NCT03679884). In Study 1, patients had a mean age of 55.4 years (range 18 to 88 years), with 39.1% of subjects ≥ 65 years of age, including 5.8% ≥ 75 years of age. Patients were identified as female or male and by US census-based racial and ethnic categories. The percentages of patients in the respective categories were: female sex (67.1%), White (90%), Black or African American (8%), Asian (1.0%), or Other race (< 1%). In Study 2, patients had a mean age of 56.7 years (range 19 to 85 years), with 39.3% of subjects ≥ 65 years of age, including 6.1% ≥ 75 years of age. Patients were identified as female or male and by US census-based racial and ethnic categories. The percentages of patients in the respective categories were: female sex (69.0%), White (88%), Black or African American (8%), Asian (4%), or Other race (< 1%). Primary efficacy endpoints for both studies were the change from baseline to Month 1 and Month 3 in Latency to Persistent Sleep (LPS) and Wake After Sleep Onset (WASO), measured objectively by polysomnography in a sleep laboratory. LPS is a measure of sleep induction and WASO is a measure of sleep maintenance. Secondary endpoint included in the statistical testing hierarchy with Type 1 error control was patient-reported Total Sleep Time (sTST), evaluated every morning at home using a validated Sleep Diary Questionnaire (SDQ). In Study 1, doses of 25 and 50 mg QUVIVIQ showed a statistically significant improvement vs placebo on polysomnography (LPS, WASO) and self-reported total sleep (sTST), at Month 1 and Month 3 (Table 3). In Study 2, QUVIVIQ 25 mg showed a statistically significant improvement vs placebo on WASO and sTST at Month 1 and Month 3 (Table 4). QUVIVIQ 10 mg did not show a statistically significant improvement on LPS, WASO, or sTST at Month 1 or Month 3. The efficacy of QUVIVIQ was similar across subgroups based on age, sex, race, and region. Table 3 Primary and Secondary Efficacy Results for Change from Baseline in Sleep Onset, Sleep Maintenance, and Subjective Total Sleep Time at Month 1 and Month 3 in Patients with Insomnia (Study 1) Treatment group/dose (N) Baseline Month 1 Month 3 Change from baseline Difference to placebo Change from baseline Difference to placebo mean (SD) mean (SD) LSM (95%CL) LSM (95%CL) mean (SD) LSM (95%CL) LSM (95%CL) CL = confidence limit; LPS = latency to persistent sleep; LSM = least squares mean; PSG = polysomnography; SD = standard deviation; sTST = subjective total sleep time; WASO = wake after sleep onset. WASO (wake after sleep onset, min): sleep maintenance, assessed by PSG 50 mg (310) 95 (38) 65 (35) -29 [-33, -25] -23 doses that were statistically significantly superior (p < 0.05) to placebo after controlling for multiple comparisons. [-28, -18] 65 (39) -29 [-33, -25] -18 [-24, -13] 25 mg (310) 98 (39) 77 (42) -18 [-22, -15] -12 [-17, -7] 73 (40) -23 [-27, -19] -12 [-17, -6] placebo (310) 103 (41) 92 (42) -6 [-10, -2] 87 (43) -11 [-15, -7] LPS (latency to persistent sleep, min): sleep onset, assessed by PSG 50 mg (310) 64 (37) 34 (27) -31 [-35, -28] -11 [-16, -7] 30 (23) -35 [-38, -31] -12 [-16, -7] 25 mg (310) 67 (39) 38 (32) -28 [-32, -25] -8 [-13, -4] 36 (34) -31 [-34, -27] -8 [-12, -3] placebo (310) 67 (40) 46 (36) -20 [-23, -17] 43 (34) -23 [-26, -20] sTST (subjective total sleep time, min): patient-reported 50 mg (310) 313 (58) 358 (74) 44 [38, 49] 22 [14, 30] 372 (79) 58 [51, 64] 20 [11, 29] 25 mg (310) 310 (60) 345 (66) 34 [29, 40] 13 [5, 20] 358 (72) 48 [41, 54] 10 [1, 19] placebo (310) 316 (53) 338 (65) 22 [16, 27] 354 (73) 38 [31, 44] Table 4 Primary and Secondary Efficacy Results for Change from Baseline in Sleep Onset, Sleep Maintenance, and Subjective Total Sleep Time at Month 1 and Month 3 in Patients with Insomnia (Study 2) Treatment group/dose (N) Baseline Month 1 Month 3 Change from baseline Difference to placebo Change from baseline Difference to placebo mean (SD) mean (SD) LSM (95%CL) LSM (95%CL) mean (SD) LSM (95%CL) LSM (95%CL) CL = confidence limit; LPS = latency to persistent sleep; LSM = least squares mean; PSG = polysomnography; SD = standard deviation; sTST = subjective total sleep time; WASO = wake after sleep onset. WASO (wake after sleep onset, min): sleep maintenance, assessed by PSG 25 mg (309) 106 (49) 80 (44) -24 [-28, -20] -12 doses that were statistically significantly superior (p < 0.05) to placebo after controlling for multiple comparisons. [-18, -6] 80 (49) -24 [-29, -19] -10 [-17, -4] placebo (308) 108 (49) 93 (50) -13 [-17, -8] 91 (47) -14 [-19, -9] LPS (latency to persistent sleep, min): sleep onset, assessed by PSG 25 mg (309) 69 (41) 42 (39) -26 [-31, -22] -6 [-12, -1] 39 (37) -29 [-33, -24] -9 [-15, -3] placebo (308) 72 (46) 50 (40) -20 [-24, -16] 49 (46) -20 [-24, -15] sTST (subjective total sleep time, min): patient-reported 25 mg (309) 308 (53) 353 (67) 44 [38, 49] 16 [8, 24] 365 (70) 56 [50, 63] 19 [10, 28] placebo (308) 308 (52) 336 (63) 28 [22, 33] 347 (65) 37 [31, 43] The effects of QUVIVIQ on LPS, WASO, and sTST were observed at Month 1 and were maintained through Month 3. The change from baseline of sTST by week in Study 1 is presented in Figure 4. Figure 4 Change from Baseline of sTST by Week (Study 1) Figure 4 14.2 Special Safety Studies Effects on Driving A randomized, double-blind, placebo- and active-controlled, four-way crossover study evaluated the effects of nighttime administration of QUVIVIQ on next-morning driving performance, using a driving simulator, 9 hours after dosing in 30 healthy elderly subjects (65–79 years, median age 70 years; 15 men, 15 women) and 30 healthy adult subjects (50–64 years, median age 58 years; 15 men, 15 women). The primary driving performance outcome measure was change in Standard Deviation of Lateral Position (SDLP). Testing was conducted after one night (initial dosing) and after four consecutive nights of treatment with QUVIVIQ 50 mg and 100 mg (two times the maximum recommended daily dose). Zopiclone 7.5 mg was used as an active comparator. For both doses, QUVIVIQ caused a statistically significant impairment in next-morning driving performance in adult or elderly subjects (compared with placebo) after the first dose. Although the mean effect on driving performance was not statistically significant (compared to placebo) after 4 consecutive nights of treatment with either dose of QUVIVIQ, driving ability was impaired in some subjects taking QUVIVIQ. Patients should be cautioned about the potential for next-morning driving impairment because there is individual variation in sensitivity to QUVIVIQ. Withdrawal of Therapy Withdrawal Symptoms In controlled efficacy and safety studies, withdrawal effects were assessed by the Tyrer Benzodiazepine Withdrawal Symptom Questionnaire following discontinuation of QUVIVIQ, and by adverse event reporting during a single-blind placebo run-out period. No evidence of withdrawal symptoms was observed upon treatment discontinuation. Loss of Treatment Effect After Discontinuation The loss of effect from stopping treatment with QUVIVIQ was assessed during the placebo run-out period after 3 months of treatment with QUVIVIQ in Study 1 and Study 2. After treatment discontinuation, in Study 1, patients previously treated with QUVIVIQ 50 mg experienced mean increases of 25 minutes in WASO, 16 minutes in LPS during the next night of sleep, and a mean decrease in sTST of 14 minutes per night over the next week, as compared to the last assessment on treatment. Following QUVIVIQ 25 mg discontinuation, a similar pattern was observed with mean increases in WASO of 19 minutes, 15 minutes in LPS, and a mean decrease in sTST of 7 minutes. Similar changes were observed with the 25 mg dose in Study 2. In both studies, patients who were on placebo and continued on placebo in the run-out period experienced minimal changes in WASO, LPS, or sTST.

8.5 Geriatric Use No dose adjustment is required in patients over the age of 65 years. Of the total number of subjects in the clinical studies of QUVIVIQ with insomnia (N = 1854), approximately 39% (N = 727) were ≥ 65 years and 5.9% (N = 110) were ≥ 75 years. The likelihood of somnolence and fatigue increased with patient age. Because QUVIVIQ can increase somnolence and drowsiness, patients, particularly the elderly, are at higher risk of falls [see Warnings and Precautions (5.1) ] .

8.4 Pediatric Use The safety and effectiveness of QUVIVIQ have not been established in pediatric patients.

8.1 Pregnancy Pregnancy Exposure Registry There will be a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to QUVIVIQ during pregnancy. Pregnant women exposed to QUVIVIQ and healthcare providers are encouraged to call Idorsia Pharmaceuticals Ltd at 1-833-400-9611. Risk Summary There are no available data on QUVIVIQ use in pregnant women to evaluate for drug-associated risks of major birth defects, miscarriage, or other adverse maternal or fetal outcomes. In animal reproduction studies, oral administration of daridorexant to pregnant rats and rabbits during the period of organogenesis did not cause fetal toxicity or malformation at doses up to 8 and 10 times the maximum recommended human dose (MRHD) of 50 mg, respectively, based on AUC. Oral administration of daridorexant to pregnant and lactating rats did not cause any maternal or developmental toxicity at doses up to 9 times the MRHD, based on AUC (see Data ) . The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Data Animal Data Daridorexant was administered orally to pregnant rats during the period of organogenesis at doses of 30, 100, and 300 mg/kg/day, which are approximately 1, 3, and 8 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant did not cause any maternal or embryofetal toxicities or fetal malformation at doses up to 300 mg/kg/day. The NOAEL for maternal and fetal toxicity is 300 mg/kg/day, which is approximately 8 times the MRHD of 50 mg, based on AUC. Daridorexant was administered orally to pregnant rabbits during the period of organogenesis at doses of 30, 60, and 120 mg/kg/day, which are approximately 3, 4, and 10 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant did not cause any fetal toxicity or malformation at doses up to 120 mg/kg/day. Daridorexant caused maternal toxicities of decreased weight gain and food consumption at the dose of 120 mg/kg/day. The NOAELs for maternal and fetal toxicity are 60 and 120 mg/kg/day, respectively, which are approximately 4 and 10 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant was administered orally to pregnant rats during gestation and lactation at doses of 50, 100, and 300 mg/kg/day, which are approximately 1, 3, and 9 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant did not cause any maternal or developmental toxicities at doses up to 300 mg/kg/day. The NOAEL for maternal and developmental toxicity is 300 mg/kg/day, which is approximately 9 times the MRHD of 50 mg, based on AUC.

8 USE IN SPECIFIC POPULATIONS 8.1 Pregnancy Pregnancy Exposure Registry There will be a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to QUVIVIQ during pregnancy. Pregnant women exposed to QUVIVIQ and healthcare providers are encouraged to call Idorsia Pharmaceuticals Ltd at 1-833-400-9611. Risk Summary There are no available data on QUVIVIQ use in pregnant women to evaluate for drug-associated risks of major birth defects, miscarriage, or other adverse maternal or fetal outcomes. In animal reproduction studies, oral administration of daridorexant to pregnant rats and rabbits during the period of organogenesis did not cause fetal toxicity or malformation at doses up to 8 and 10 times the maximum recommended human dose (MRHD) of 50 mg, respectively, based on AUC. Oral administration of daridorexant to pregnant and lactating rats did not cause any maternal or developmental toxicity at doses up to 9 times the MRHD, based on AUC (see Data ) . The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Data Animal Data Daridorexant was administered orally to pregnant rats during the period of organogenesis at doses of 30, 100, and 300 mg/kg/day, which are approximately 1, 3, and 8 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant did not cause any maternal or embryofetal toxicities or fetal malformation at doses up to 300 mg/kg/day. The NOAEL for maternal and fetal toxicity is 300 mg/kg/day, which is approximately 8 times the MRHD of 50 mg, based on AUC. Daridorexant was administered orally to pregnant rabbits during the period of organogenesis at doses of 30, 60, and 120 mg/kg/day, which are approximately 3, 4, and 10 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant did not cause any fetal toxicity or malformation at doses up to 120 mg/kg/day. Daridorexant caused maternal toxicities of decreased weight gain and food consumption at the dose of 120 mg/kg/day. The NOAELs for maternal and fetal toxicity are 60 and 120 mg/kg/day, respectively, which are approximately 4 and 10 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant was administered orally to pregnant rats during gestation and lactation at doses of 50, 100, and 300 mg/kg/day, which are approximately 1, 3, and 9 times the MRHD of 50 mg, respectively, based on AUC. Daridorexant did not cause any maternal or developmental toxicities at doses up to 300 mg/kg/day. The NOAEL for maternal and developmental toxicity is 300 mg/kg/day, which is approximately 9 times the MRHD of 50 mg, based on AUC. 8.2 Lactation Risk Summary There are no data on the presence of daridorexant in human milk, the effects on the breastfed infant, or the effects on milk production. Daridorexant and its metabolites were present in the milk of lactating rats. When a drug is present in animal milk, it is likely that the drug will be present in human milk. Infants exposed to QUVIVIQ through breastmilk should be monitored for excessive sedation. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for QUVIVIQ and any potential adverse effects on the breastfed infant from QUVIVIQ or from the underlying maternal condition. 8.4 Pediatric Use The safety and effectiveness of QUVIVIQ have not been established in pediatric patients. 8.5 Geriatric Use No dose adjustment is required in patients over the age of 65 years. Of the total number of subjects in the clinical studies of QUVIVIQ with insomnia (N = 1854), approximately 39% (N = 727) were ≥ 65 years and 5.9% (N = 110) were ≥ 75 years. The likelihood of somnolence and fatigue increased with patient age. Because QUVIVIQ can increase somnolence and drowsiness, patients, particularly the elderly, are at higher risk of falls [see Warnings and Precautions (5.1) ] . 8.6 Hepatic Impairment QUVIVIQ has not been studied in patients with severe hepatic impairment (Child-Pugh score ≥ 10). Use in this population is not recommended [see Clinical Pharmacology (12.3) ] . Reduce the dose of QUVIVIQ in patients with moderate hepatic impairment (Child-Pugh score 7–9) [see Dosage and Administration (2.3) ] . Moderate hepatic impairment may increase daridorexant systemic exposure to a clinically relevant extent [see Clinical Pharmacology (12.3) ] , which may increase the frequency or severity of adverse reactions. 8.7 Patients with Compromised Respiratory Function Obstructive sleep apnea The respiratory depressant effect of QUVIVIQ was evaluated after one night and after five consecutive nights of treatment in a randomized, placebo-controlled, two-period crossover study in 25 patients with mild to moderate OSA (apnea-hypopnea index [AHI] 5 to 30 events per hour) not requiring CPAP. Following once-daily dosing of 50 mg, the mean treatment difference (daridorexant – placebo) on Day 5 for AHI was 0.74 (90% CI, -1.43 to 2.92). Due to study limitations, including the short duration of the study, clinically meaningful respiratory effects of QUVIVIQ in OSA cannot be excluded, including for long-term treatment. QUVIVIQ has not been studied in patients with severe OSA (AHI ≥ 30) or those requiring CPAP [see Warnings and Precautions (5.5) ] . Chronic obstructive pulmonary disease The respiratory depressant effect of QUVIVIQ was evaluated after one night and after five consecutive nights of treatment in a randomized, placebo-controlled, two-period crossover study in 25 patients with moderate COPD (FEV1/FVC ratio ≤ 70% and 40% ≤ FEV 1 < 80% of predicted). Following once-daily dosing of 50 mg, the mean SpO 2 treatment difference (daridorexant – placebo) on Day 5 was 0.18% (90% CI, -0.21 to 0.57). QUVIVIQ has not been studied in patients with severe COPD (FEV 1 < 40% of predicted). Clinically meaningful respiratory effects of QUVIVIQ in patients with compromised respiratory function cannot be excluded [see Warnings and Precautions (5.5) ] .

16 HOW SUPPLIED/STORAGE AND HANDLING 16.1 How Supplied QUVIVIQ tablets are available as: 25 mg, light purple, arc-triangle shaped film-coated tablets debossed with "25" on one side, and "i" on the other side. NDC 80491-7825-3, bottle of 30 with child-resistant closure 50 mg: light orange, arc-triangle shaped film-coated tablets debossed with "50" on one side, and "i" on the other side. NDC 80491-7850-3, bottle of 30 with child-resistant closure 16.2 Storage and Handling Store at 20°C to 25°C (68°F to 77°F), excursions permitted between 15°C and 30°C (59°F and 86°F) [see USP Controlled Room Temperature].

16.2 Storage and Handling Store at 20°C to 25°C (68°F to 77°F), excursions permitted between 15°C and 30°C (59°F and 86°F) [see USP Controlled Room Temperature].