Lumryz

6 ADVERSE REACTIONS The following clinically significant adverse reactions appear in other sections of the labeling: ● CNS Depression [see Warnings and Precautions (5.1) ] ● Abuse and Misuse [see Warnings and Precautions (5.2) ] ● Respiratory Depression and Sleep-Disordered Breathing [see Warnings and Precautions (5.4) ] ● Depression and Suicidality [see Warnings and Precautions (5.5) ] ● Other Behavioral or Psychiatric Adverse Reactions [see Warnings and Precautions (5.6) ] ● Parasomnias [see Warnings and Precautions (5.7) ] ● Use in Patients Sensitive to High Sodium Intake [see Warnings and Precautions (5.8) ] Most common adverse reactions (incidence ≥ 5% and greater than placebo) reported for any dose of LUMRYZ were nausea, dizziness, enuresis, headache, and vomiting ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Avadel CNS Pharmaceuticals, LLC at 1-888-828-2335 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 the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. LUMRYZ was studied in one placebo-controlled trial (Study 1) [see Clinical Studies (14) ] in 212 patients with narcolepsy (107 patients treated with LUMRYZ and 105 with placebo). Adverse Reactions Leading to Treatment Discontinuation In Study 1, 15.9% of patients treated with LUMRYZ discontinued because of adverse reactions, compared to 1.9% of patients receiving placebo. The most common adverse reaction leading to discontinuation was dizziness (4.7%). For LUMRYZ, 5.6% of patients discontinued due to adverse reactions on 4.5 g, 4.1% on 6 g, 4.5% on 7.5 g, and 3.9% on 9 g dose. Most Common Adverse Reactions The most common adverse reactions (incidence ≥ 5% and greater than placebo) reported for any dose of LUMRYZ were nausea, dizziness, enuresis, headache, and vomiting. Adverse Reactions Occurring at an Incidence of 2% or Greater Table 2 lists adverse reactions occurring in 2% or more of LUMRYZ-treated patients on any individual dose and at a rate greater than placebo-treated patients in Study 1. Table 2: Adverse Reactions Occurring in 2% or More of LUMRYZ-Treated Patients and Greater than for Placebo-Treated Patients in Study 1 Adverse Reaction Placebo (N=105) % LUMRYZ 4.5 g (N=107) % LUMRYZ 6 g (N=97) % LUMRYZ 7.5 g (N=88) % LUMRYZ 9 g (N=77) % Gastrointestinal Disorders Vomiting 2 3 3 6 5 Nausea 3 6 8 7 1 Investigations Weight Decreased 0 1 0 0 4 Metabolism and Nutritional Disorders Decreased Appetite 0 4 4 3 3 Nervous System Disorders Dizziness 0 6 4 6 5 Somnolence 1 0 1 2 4 Headache 6 7 5 6 0 Psychiatric Disorders Enuresis 0 2 4 9 9 Anxiety 1 3 1 3 1 Somnambulism 0 1 2 0 0 Dose-Response Information In the clinical trial in adult patients with narcolepsy, a dose-response relationship was observed for enuresis and somnolence. Additional Adverse Reactions Adverse reactions observed in clinical studies with immediate-release sodium oxybate (≥2%), but not observed in Study 1 at a frequency of higher than 2%, and which may be relevant for LUMRYZ: diarrhea, abdominal pain upper, dry mouth, pain, feeling drunk, peripheral edema, cataplexy, muscle spasms, pain in extremity, tremor, disturbance in attention, paresthesia, sleep paralysis, disorientation, irritability, and hyperhidrosis. 6.2 Postmarketing Experience The following adverse reactions have been identified during postapproval use of sodium oxybate. 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: Arthralgia, decreased appetite, fall*, fluid retention, hangover, headache, hypersensitivity, hypertension, memory impairment, nocturia, panic attack, vision blurred, and weight decreased. *The sudden onset of sleep in patients taking sodium oxybate, including in a standing position or while rising from bed, has led to falls complicated by injuries, in some cases requiring hospitalization.

4 CONTRAINDICATIONS LUMRYZ is contraindicated for use in: ● combination with sedative hypnotics [see Warnings and Precautions (5.1) ] ● combination with alcohol [see Warnings and Precautions (5.1) ] ● patients with succinic semialdehyde dehydrogenase deficiency [see Clinical Pharmacology (12.3) ] • In combination with sedative hypnotics or alcohol ( 4 ) • Succinic semialdehyde dehydrogenase deficiency ( 4 )

11 DESCRIPTION Sodium oxybate, a CNS depressant, is the active ingredient in LUMRYZ for extended-release oral suspension. The chemical name for sodium oxybate is sodium 4-hydroxybutyrate. The molecular formula is C 4 H 7 NaO 3 , and the molecular weight is 126.09 g/mole. The chemical structure is: Sodium oxybate is a white to off-white solid powder. Each packet of LUMRYZ contains 4.5 g, 6 g, 7.5 g, or 9 g of sodium oxybate, equivalent to 3.7 g, 5.0 g, 6.2 g, or 7.4 g of oxybate, respectively. The inactive ingredients are carrageenan, hydrogenated vegetable oil, hydroxyethyl cellulose, magnesium stearate, malic acid, methacrylic acid copolymer, microcrystalline cellulose, povidone, and xanthan gum. image description

2 DOSAGE AND ADMINISTRATION Dosing Information • Initiate dosage at 4.5 g once per night orally ( 2.1 ). • Titrate to effect in increments of 1.5 g per night at weekly intervals ( 2.1 ). • Recommended dosage range: 6 g to 9 g once per night orally ( 2.1 ). Important Administration Information • Prepare the dose of LUMRYZ prior to bedtime; suspend dose in approximately ⅓ cup of water in the mixing cup provided ( 2.2 ). • Allow 2 hours after eating before dosing ( 2.2 ). • Take LUMRYZ while in bed and lie down after dosing ( 2.2 ). 2.1 Dosing Information The recommended starting dosage is 4.5 grams (g) once per night administered orally. Increase the dosage by 1.5 g per night at weekly intervals to the recommended dosage range of 6 g to 9 g once per night orally. The dosage may be gradually titrated based on efficacy and tolerability. Doses higher than 9 g per night have not been studied and should not ordinarily be administered. 2.2 Important Administration Instructions LUMRYZ is taken orally as a single dose at bedtime. Prepare the dose of LUMRYZ prior to bedtime. Prior to ingestion, the dose of LUMRYZ should be suspended in approximately 1/3 cup (approximately 80 mL) of water in the mixing cup provided [see Instructions for Use ] . Do not use hot water [see Clinical Pharmacology (12.3) ] . After mixing, consume LUMRYZ within 30 minutes. Take LUMRYZ at least 2 hours after eating [see Clinical Pharmacology (12.3) ]. Patients should take LUMRYZ while in bed and lie down immediately after dosing as LUMRYZ may cause them to fall asleep abruptly without first feeling drowsy. Patients will often fall asleep within 5 minutes of taking LUMRYZ, and will usually fall asleep within 15 minutes, though the time it takes any individual patient to fall asleep may vary from night to night. Patients should remain in bed following ingestion of LUMRYZ. 2.3 Switching Patients from Immediate-Release Sodium Oxybate Patients who are currently being treated with immediate-release sodium oxybate may be switched to LUMRYZ at the nearest equivalent dosage in grams per night (e.g., 7.5 g sodium oxybate divided into two 3.75 g doses per night to 7.5 g LUMRYZ once per night).

1 INDICATIONS AND USAGE LUMRYZ is indicated for the treatment of cataplexy or excessive daytime sleepiness (EDS) in adults with narcolepsy. LUMRYZ is a central nervous system depressant indicated for the treatment of cataplexy or excessive daytime sleepiness (EDS) in adults with narcolepsy ( 1 ).

9 DRUG ABUSE AND DEPENDENCE 9.1 Controlled Substance LUMRYZ is a Schedule III controlled substance under the Federal Controlled Substances Act. Non-medical use of LUMRYZ could lead to penalties assessed under the higher Schedule I controls. 9.2 Abuse LUMRYZ (sodium oxybate), the sodium salt of GHB, produces dose-dependent central nervous system effects, including hypnotic and positive subjective reinforcing effects. The onset of effect is rapid, enhancing its potential for abuse or misuse. Drug abuse is the intentional non-therapeutic use of a drug product or substance, even once, for its desirable psychological or physiological effects. Misuse is the intentional use, for therapeutic purposes of a drug by an individual in a way other than prescribed by a healthcare provider or for whom it was not prescribed. Drug misuse and abuse may occur with or without progression to addiction. Drug addiction is a cluster of behavioral, cognitive, and physiological phenomena that may include a strong desire to take the drug, difficulties in controlling drug use (e.g., continuing drug use despite harmful consequences, giving a higher priority to drug use than other activities and obligations), and possible tolerance or physical dependence. The rapid onset of sedation, coupled with the amnestic features of GHB, particularly when combined with alcohol, has proven to be dangerous for the voluntary and involuntary user (e.g., assault victim). Illicit GHB is abused in social settings primarily by young adults. Some of the doses estimated to be abused are in a similar dosage range to that used for treatment of patients with cataplexy. GHB has some commonalities with ethanol over a limited dose range, and some cross tolerance with ethanol has been reported as well. Cases of severe dependence and craving for GHB have been reported when the drug is taken around the clock. Patterns of abuse indicative of dependence include: 1) the use of increasingly large doses, 2) increased frequency of use, and 3) continued use despite adverse consequences. Because illicit use and abuse of GHB have been reported, physicians should carefully evaluate patients for a history of drug abuse and follow such patients closely, observing them for signs of misuse or abuse of GHB (e.g., increase in size or frequency of dosing, drug-seeking behavior, feigned cataplexy). Dispose of LUMRYZ according to state and federal regulations. It is safe to dispose of LUMRYZ down the sanitary sewer. 9.3 Dependence 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 after abrupt discontinuation or a significant dose reduction of a drug. There have been case reports of withdrawal, ranging from mild to severe, following discontinuation of illicit use of GHB at frequent repeated doses (18 g to 250 g per day) in excess of the recommended dosage range. Signs and symptoms of GHB withdrawal following abrupt discontinuation included insomnia, restlessness, anxiety, psychosis, lethargy, nausea, tremor, sweating, muscle cramps, tachycardia, headache, dizziness, rebound fatigue and sleepiness, confusion, and, particularly in the case of severe withdrawal, visual hallucinations, agitation, and delirium. These symptoms generally abated in 3 to 14 days. In cases of severe withdrawal, hospitalization may be required. The discontinuation effects of LUMRYZ have not been systematically evaluated in controlled clinical trials. In the clinical trial experience with immediate-release sodium oxybate in narcolepsy/cataplexy patients at recommended doses, two patients reported anxiety and one reported insomnia following abrupt discontinuation at the termination of the clinical trial; in the two patients with anxiety, the frequency of cataplexy had increased markedly at the same time. Tolerance Tolerance is a physiological state characterized by a reduced response to a drug after repeated administration (i.e., a higher dose of a drug is required to produce the same effect that was once obtained at a lower dose). Tolerance to LUMRYZ has not been systematically studied in controlled clinical trials. There have been some case reports of symptoms of tolerance developing after illicit use at dosages far in excess of the recommended LUMRYZ dosage regimen. Clinical studies of immediate-release sodium oxybate in the treatment of alcohol withdrawal suggest a potential cross-tolerance with alcohol. The safety and effectiveness of LUMRYZ in the treatment of alcohol withdrawal have not been established.

10 OVERDOSAGE 10.1 Human Experience Information regarding overdose with LUMRYZ is derived largely from reports in the medical literature that describe symptoms and signs in individuals who have ingested GHB illicitly. In these circumstances, the co-ingestion of other drugs and alcohol was common and may have influenced the presentation and severity of clinical manifestations of overdose. In adult clinical trials of immediate-release sodium oxybate, two cases of overdose with sodium oxybate were reported. In the first case, an estimated dose of 150 g, more than 15 times the maximum recommended dose, caused a patient to be unresponsive with brief periods of apnea and to be incontinent of urine and feces. This individual recovered without sequelae. In the second case, death was reported following a multiple drug overdose consisting of sodium oxybate and numerous other drugs. 10.2 Signs and Symptoms Information about signs and symptoms associated with overdosage with LUMRYZ derives from reports of illicit use of GHB. Patient presentation following overdose is influenced by the dose ingested, the time since ingestion, the co-ingestion of other drugs and alcohol, and the fed or fasted state. Patients have exhibited varying degrees of depressed consciousness that may fluctuate rapidly between a confusional, agitated combative state with ataxia and coma. Emesis (even when obtunded), diaphoresis, headache, and impaired psychomotor skills have been observed. No typical pupillary changes have been described to assist in diagnosis; pupillary reactivity to light is maintained. Blurred vision has been reported. An increasing depth of coma and acidosis have been observed at higher doses. Myoclonus and tonic-clonic seizures have been reported. Respiration may be unaffected or compromised in rate and depth. Cheyne-Stokes respiration and apnea have been observed. Bradycardia and hypothermia may accompany unconsciousness, as well as muscular hypotonia, but tendon reflexes remain intact. 10.3 Recommended Treatment of Overdose General symptomatic and supportive care should be instituted immediately, and gastric decontamination may be considered if co-ingestants are suspected. Because emesis may occur in the presence of obtundation, appropriate posture (left lateral recumbent position) and protection of the airway by intubation may be warranted. Although the gag reflex may be absent in deeply comatose patients, even unconscious patients may become combative to intubation, and rapid- sequence induction (without the use of sedative) should be considered. Vital signs and consciousness should be closely monitored. The bradycardia reported with GHB overdose has been responsive to atropine intravenous administration. No reversal of the central depressant effects of LUMRYZ can be expected from naloxone or flumazenil administration. The use of hemodialysis and other forms of extracorporeal drug removal have not been studied in GHB overdose, but have been reported in cases of acidosis associated with GHB ingestions of 125 g or greater; however, due to the rapid metabolism of sodium oxybate, these measures may not be warranted. 10.4 Poison Control Center As with the management of all cases of drug overdosage, the possibility of multiple drug ingestion should be considered. The healthcare provider is encouraged to collect urine and blood samples for routine toxicologic screening, and to consult with a regional poison control center (1-800-222-1222) for current treatment recommendations.

7 DRUG INTERACTIONS 7.1 Alcohol, Sedative Hypnotics, and CNS Depressants LUMRYZ is contraindicated for use in combination with alcohol or sedative hypnotics. Use of other CNS depressants may potentiate the CNS-depressant effects of LUMRYZ [see Warnings and Precautions (5.1) ] . In addition to coadministration of LUMRYZ and alcohol being contraindicated because of respiratory depression, consumption of alcohol while taking LUMRYZ may also result in a more rapid release of the dose of sodium oxybate [see Clinical Pharmacology (12.3) ] .

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action LUMRYZ is a CNS depressant. The mechanism of action of LUMRYZ in the treatment of narcolepsy is unknown. Sodium oxybate is the sodium salt of gamma-hydroxybutyrate (GHB), an endogenous compound and metabolite of the neurotransmitter GABA. It is hypothesized that the therapeutic effects of LUMRYZ on cataplexy and excessive daytime sleepiness are mediated through GABA B actions at noradrenergic and dopaminergic neurons, as well as at thalamocortical neurons. 12.3 Pharmacokinetics Absorption Following oral administration of LUMRYZ, the peak plasma concentrations (C max ) following administration of one 6 g dose was 66 mcg/mL, and the time to peak plasma concentration (T max ) was 1.5 hours. Following oral administration of LUMRYZ, the plasma levels of GHB increased dose-proportionally for C max and more than dose-proportionally for AUC (respectively 2.0-fold and 2.3-fold increases as total daily dose is doubled from 4.5 g to 9 g). Effect of Food Administration of LUMRYZ immediately after a high-fat meal resulted in a mean reduction in C max and AUC of GHB by 33% and 14%, respectively; average T max increased from 0.5 hours to 1.5 hours [see Dosage and Administration (2.2) ] . Effect of Ethanol An in vitro study showed alcohol-induced dose-dumping of sodium oxybate from extended-release oral suspension at 1 hour in the presence of 40% alcohol, and approximately 60% increase of drug release at 2 hours in the presence of 20% alcohol [see Contraindications (4) and Warnings and Precautions (5.1) ] . Effect of Water Temperature An in vitro dissolution study showed that LUMRYZ mixed with hot water (90°C) resulted in a dose-dumping phenomenon for the release of sodium oxybate, whereas warm water (50°C) did not significantly affect the drug release from the extended-release suspension [see Dosage and Administration (2.2) ]. Distribution GHB is a hydrophilic compound with an apparent volume of distribution averaging 190 mL/kg to 384 mL/kg. At GHB concentrations ranging from 3 mcg/mL to 300 mcg/mL, less than 1% is bound to plasma proteins. Elimination Metabolism Animal studies indicate that metabolism is the major elimination pathway for GHB, producing carbon dioxide and water via the tricarboxylic acid (Krebs) cycle, and secondarily by β-oxidation. The primary pathway involves a cytosolic NADP + -linked enzyme, GHB dehydrogenase, which catalyzes the conversion of GHB to succinic semialdehyde, which is then biotransformed to succinic acid by the enzyme succinic semialdehyde dehydrogenase. Succinic acid enters the Krebs cycle where it is metabolized to carbon dioxide and water. A second mitochondrial oxidoreductase enzyme, a transhydrogenase, also catalyzes the conversion to succinic semialdehyde in the presence of α-ketoglutarate. An alternate pathway of biotransformation involves β-oxidation via 3,4-dihydroxybutyrate to carbon dioxide and water. No active metabolites have been identified. Excretion The clearance of GHB is almost entirely by biotransformation to carbon dioxide, which is then eliminated by expiration. On average, less than 5% of unchanged drug appears in human urine within 6 to 8 hours after dosing. Fecal excretion is negligible. GHB has an elimination half-life of 0.5 to 1 hour. Specific Population Geriatric Patients There is limited experience with LUMRYZ in the elderly. Results from a pharmacokinetic study of immediate-release sodium oxybate (n=20) in another studied population indicate that the pharmacokinetic characteristics of GHB are consistent among younger (age 48 to 64 years) and older (age 65 to 75 years) adults. Male and Female Patients In a study of 18 female and 18 male healthy adult volunteers, no gender differences were detected in the pharmacokinetics of GHB following an immediate-release 4.5 g oral dose of sodium oxybate. Racial or Ethnic Groups There are insufficient data to evaluate any pharmacokinetic differences among races. Patients with Renal Impairment No pharmacokinetic study in patients with renal impairment has been conducted. Patients with Hepatic Impairment The pharmacokinetics of GHB in 16 cirrhotic patients, half without ascites (Child’s Class A) and half with ascites (Child’s Class C), were compared to the kinetics in 8 subjects with normal hepatic function, after a single sodium oxybate oral dose of 25 mg/kg. AUC values were doubled in cirrhotic patients, with apparent oral clearance reduced from 9.1 mL/min/kg in healthy adults to 4.5 and 4.1 mL/min/kg in Class A and Class C patients, respectively. Elimination half-life was significantly longer in Class C and Class A patients than in control patients (mean t 1/2 of 59 minutes and 32 minutes, respectively, versus 22 minutes in control patients). LUMRYZ should not be initiated in patients with liver impairment [see Use in Specific Populations (8.6) ]. Drug Interaction Studies In vitro studies with pooled human liver microsomes indicate that sodium oxybate does not significantly inhibit the activities of the human isoenzymes CYP1A2, CYP2C9, CYP2C19, CYP2D6, CYP2E1, or CYP3A, up to the concentration of 3 mM (378 mcg/mL), a level considerably higher than levels achieved with the maximum recommended dose. A drug interaction study in healthy adults (age 18 to 55 years) was conducted with LUMRYZ and divalproex sodium. Co-administration of a single dose of LUMRYZ (6 g) with divalproex sodium ER at steady state resulted in an approximate 18% increase in AUC (90% CI ratio range of 112%-123%), which is not expected to be clinically meaningful, while C max was comparable. A single dose of LUMRYZ (6 g) did not appear to affect the pharmacokinetics of divalproex sodium. However, a pharmacodynamic interaction between LUMRYZ and divalproex sodium, a sedative antiepileptic drug, cannot be ruled out [see Warnings and Precautions (5.1) and Drug Interactions (7.1) ] . Drug interaction studies in healthy adults (age 18 to 50 years) were conducted with immediate-release sodium oxybate and diclofenac and ibuprofen: ● Diclofenac: Co-administration of sodium oxybate (6 g per day as two equal doses of 3 grams dosed four hours apart) with diclofenac (50 mg/dose twice per day) showed no significant changes in systemic exposure to GHB. Co-administration did not appear to affect the pharmacokinetics of diclofenac. ● Ibuprofen: Co-administration of sodium oxybate (6 g per day as two equal doses of 3 grams dosed four hours apart) with ibuprofen (800 mg/dose four times per day also dosed four hours apart) resulted in comparable systemic exposure to GHB, as shown by plasma C max and AUC values. Co-administration did not affect the pharmacokinetics of ibuprofen. Drug interaction studies in healthy adults demonstrated no pharmacokinetic interactions between immediate-release sodium oxybate and protriptyline hydrochloride, zolpidem tartrate, and modafinil. Also, there were no pharmacokinetic interactions with the alcohol dehydrogenase inhibitor fomepizole. However, pharmacodynamic interactions with these drugs cannot be ruled out. Alteration of gastric pH with omeprazole produced no significant change in the pharmacokinetics of GHB. In addition, drug interaction studies in healthy adults demonstrated no pharmacokinetic or clinically significant pharmacodynamic interactions between immediate-release sodium oxybate and duloxetine HCl.

20230607

4

3 DOSAGE FORMS AND STRENGTHS For extended-release oral suspension: LUMRYZ is a white to off-white powder provided in packets of 4.5 g, 6 g, 7.5 g, or 9 g of sodium oxybate. For extended-release oral suspension: Packets of 4.5 g, 6 g, 7.5 g, or 9 g ( 3 )

Lumryz sodium oxybate SODIUM OXYBATE 4-HYDROXYBUTANOIC ACID white to off-white powder Lumryz sodium oxybate SODIUM OXYBATE 4-HYDROXYBUTANOIC ACID white to off-white powder Lumryz sodium oxybate SODIUM OXYBATE 4-HYDROXYBUTANOIC ACID white to off-white powder Lumryz sodium oxybate SODIUM OXYBATE 4-HYDROXYBUTANOIC ACID white to off-white powder

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis Administration of sodium oxybate to rats at oral doses of up to 1,000 mg/kg/day for 83 (males) or 104 (females) weeks resulted in no increase in tumors. Plasma exposure (AUC) at the highest dose tested was 2 times that in humans at the maximum recommended human dose (MRHD) of 9 g per night. The results of 2-year carcinogenicity studies in mouse and rat with gamma-butyrolactone, a compound that is metabolized to sodium oxybate in vivo, showed no clear evidence of carcinogenic activity. The plasma AUCs of sodium oxybate achieved at the highest doses tested in these studies were less than that in humans at the MRHD. Mutagenesis Sodium oxybate was negative in the in vitro bacterial gene mutation assay, an in vitro chromosomal aberration assay in mammalian cells, and in an in vivo rat micronucleus assay. Impairment of Fertility Oral administration of sodium oxybate (150, 350, or 1,000 mg/kg/day) to male and female rats prior to and throughout mating and continuing in females through early gestation resulted in no adverse effects on fertility. The highest dose tested is approximately equal to the MRHD on a mg/m 2 basis.

NDA214755

Lumryz

sodium oxybate

13551-003

HUMAN PRESCRIPTION DRUG

ORAL

PRINCIPAL DISPLAY PANEL - NDC: 13551-001-01 - 4.5 g Packet Label image description

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling ( Medication Guide and Instructions for Use ). Central Nervous System Depression Inform patients that LUMRYZ can cause central nervous system depression, including respiratory depression, hypotension, profound sedation, syncope, and death. Instruct patients to not engage in activities requiring mental alertness or motor coordination, including operating hazardous machinery, for at least 6 hours after taking LUMRYZ. Instruct patients to inform their healthcare providers of all the medications they take [see Warnings and Precautions (5.1) ]. Abuse and Misuse Inform patients that the active ingredient of LUMRYZ is gamma-hydroxybutyrate (GHB), which is associated with serious adverse reactions with illicit use and abuse [see Warnings and Precautions (5.2) ]. LUMRYZ REMS LUMRYZ is available only through a restricted program called the LUMRYZ REMS [see Warnings and Precautions (5.3) ] . Inform the patient of the following notable requirements: ● LUMRYZ is dispensed only by pharmacies that are specially certified ● LUMRYZ will be dispensed and shipped only to patients who are enrolled in the LUMRYZ REMS LUMRYZ is available only from certified pharmacies participating in the program. Therefore, provide patients with the telephone number and website for information on how to obtain the product. Alcohol or Sedative Hypnotics Advise patients that alcohol and other sedative hypnotics should not be taken with LUMRYZ [see Contraindications (4) and Warnings and Precautions (5.1) ] . Sedation Inform patients that they are likely to fall asleep quickly after taking LUMRYZ (often within 5 and usually within 15 minutes), but the time it takes to fall asleep can vary from night to night. The sudden onset of sleep, including in a standing position or while rising from bed, has led to falls complicated by injuries, in some cases requiring hospitalization [see Adverse Reactions (6.2) ] . Instruct patients that they should remain in bed following ingestion of their dose [see Dosage and Administration (2.2) ] . Food Effects on LUMRYZ Inform patients that LUMRYZ should be taken at least 2 hours after eating. Respiratory Depression and Sleep-Disordered Breathing Inform patients that LUMRYZ may impair respiratory drive, especially in patients with compromised respiratory function, and may cause apnea [see Warnings and Precautions (5.4) ]. Depression and Suicidality Instruct patients to contact a healthcare provider immediately if they develop depressed mood, markedly diminished interest or pleasure in usual activities, significant change in weight and/or appetite, psychomotor agitation or retardation, increased fatigue, feelings of guilt or worthlessness, slowed thinking or impaired concentration, or suicidal ideation [see Warnings and Precautions (5.5) ]. Other Behavioral or Psychiatric Adverse Reactions Inform patients that LUMRYZ can cause behavioral or psychiatric adverse reactions, including confusion, anxiety, and psychosis. Instruct them to notify their healthcare provider if any of these types of symptoms occur [see Warnings and Precautions (5.6) ]. Sleepwalking Instruct patients that LUMRYZ has been associated with sleepwalking and other behaviors during sleep, and to contact their healthcare provider if this occurs [see Warnings and Precautions (5.7) ]. Sodium Intake Instruct patients that LUMRYZ contains a significant amount of sodium and patients who are sensitive to sodium intake (e.g., those with heart failure, hypertension, or renal impairment) should limit their sodium intake [see Warnings and Precautions (5.8) ]. Distributed By: Avadel CNS Pharmaceuticals, LLC Chesterfield, MO

This Instructions for Use contains information on how to take LUMRYZ. Read this Instructions for Use before taking LUMRYZ and each time you get a refill. There may be new information. This information does not take the place of talking to your doctor about your medical condition or your treatment. If you have questions, please talk with your doctor. • Take 1 packet of LUMRYZ each day at bedtime. • Avoid getting out of your bed after taking LUMRYZ. Some people fall asleep within 5 minutes of taking LUMRYZ and most will fall asleep within 15 minutes. The time it takes you to fall asleep might be different from night to night. • Medicines that cause sleepiness should not be used while taking LUMRYZ. • Do not use LUMRYZ with alcohol. • Do not drive or operate heavy machinery within 6 hours of taking LUMRYZ. • Mix and take LUMRYZ within 30 minutes. If not taken within 30 minutes of mixing, throw it away (dispose of it) and prepare a new dose. Additional supplies needed • Store LUMRYZ and all medicines out of the reach of children. • Store LUMRYZ at room temperature, between 68°F to 77°F (20°C to 25°C). • Store LUMRYZ in a clean and dry place. • Before using a new LUMRYZ carton, check the tamper-evident seal on the carton lid to make sure it is not missing or broken. • Do not use if the tamper-evident seal is missing or broken. • Check the expiration date (EXP) on the LUMRYZ carton. • Do not use LUMRYZ after the expiration date (EXP) on the label has passed. • Open the LUMRYZ carton by tearing the tamper-evident seal with your hands or by using a pair of scissors. • Clean the mixing cup by rinsing it with water and letting it dry before each use. • Do not use a measuring device other than the mixing cup that comes in your LUMRYZ carton to measure and take a dose of LUMRYZ. • Check the expiration date (EXP) on the packet label. Do not use the LUMRYZ packet after the expiration date (EXP) has passed. Gather the following supplies and place them on a flat surface at your bedside: • 1 bottle or glass of water (1/3 cup). Do not use hot water. • 1 LUMRYZ packet • 1 clean mixing cup. - The cap is not child resistant. • 1 pair of scissors (optional) 1.) At your bedside, open the mixing cup by twisting the cap to the left (counter-clockwise) to remove it. 2.) Fill the mixing cup with water up to Fill Line A (top line) and set the mixing cup down on a flat surface. 3.) Open 1 packet: Use scissors to cut open the packet along the Cutting Line , located on the back of the packet. Fold the packet in half at the gray Tear Mark located on the back of the packet. Tear the packet open with your hands. 4.) Pour the entire content from the packet into the water-filled mixing cup. Make sure there is no powder left in the packet. 5.) Close the mixing cup by twisting the cap to the right (clockwise) until firmly closed. 6.) Mix the water and powder solution by shaking the closed mixing cup well for at least 60 seconds (1 minute) . 7.) Make sure the solution is mixed thoroughly. The mixed solution will appear slightly milky with some lumps. The mixing cup cap is not child resistant. If the mixed solution is not drank imediately, then do not remove the cap, and keep out of reach of children. 8.) Open the mixing cup by twisting the cap to the left (counter-clockwise) and remove it. 9.) While sitting in bed drink the mixed solution within 30 minutes of mixing. Make sure to drink all the mixed solution in the mixing cup. 10.) Immediately refill your mixing cup with water up to Fill Line B (lower line) to mix in any medicine left in the mixing cup. Do not open another packet of LUMRYZ. Take only 1 packet each day at bedtime. 11.) Close the mixing cup by twisting the cap to the right (clockwise) until firmly closed. 12.) Shake well again for 10 seconds . 13.) Open the mixing cup by twisting the cap to the left (counter-clockwise) and remove it. 14.) Drink the mixed solution immediately after mixing. Make sure to drink all the mixed solution in the mixing cup. 15.) Leave the empty mixing cup at your bedside and immediately lie down to go to sleep. Avoid getting out of your bed after taking your dose. 16.) The next day, place the empty LUMRYZ packet in the trash. If any LUMRYZ remains in the packet, rinse it down the sink prior to disposal. 17.) Empty any unused LUMRYZ down the sink drain the next day. Clean the mixing cup by rinsing it with water and letting it dry before each use. After you finish all of the packets in your LUMRYZ carton After you have finished your last packet in the carton, throw away the rinsed mixing cup in the trash. If you have additional questions about LUMRYZ, talk with your doctor. You can also contact: Avadel CNS Pharmaceuticals, LLC Chesterfield, MO 63005 USA For more information on LUMRYZ, visit www.lumryz.com or call 888-8AVADEL (888-828-2335). © Avadel 2023. All rights reserved. AVADEL, the AVADEL logo, LUMRYZ, and the LUMRYZ logo are trademarks of an Avadel company. This Instructions for Use has been approved by the U.S. Food and Drug Administration. Approved: 05-2023 image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description image description

This Medication Guide has been approved by the U.S. Food and Drug Administration Approved: 05/2023 Medication Guide LUMRYZ TM (LOOM rize) (sodium oxybate) for extended-release oral suspension, CIII Read this Medication Guide carefully before you start taking LUMRYZ and each time you get a refill. There may be new information. This information does not take the place of talking to your doctor about your medical condition or treatment. What is the most important information I should know about LUMRYZ? ● LUMRYZ is a central nervous system (CNS) depressant. Taking LUMRYZ with other CNS depressants such as medicines used to make you fall asleep, including opioid analgesics, benzodiazepines, sedating antidepressants, antipsychotics, sedating anti-epileptic medicines, general anesthetics, muscle relaxants, alcohol, or street drugs, may cause serious medical problems, including: ○ trouble breathing (respiratory depression) ○ low blood pressure (hypotension) ○ changes in alertness (drowsiness) ○ fainting (syncope) ○ death Ask your doctor if you are not sure if you are taking a medicine listed above. ● LUMRYZ is a federal controlled substance (CIII). The active ingredient of LUMRYZ is a form of gamma-hydroxybutyrate (GHB) that is also a federal controlled substance (CI). Abuse of illegal GHB, either alone or with other CNS depressants may cause serious medical problems, including: ○ seizure ○ trouble breathing (respiratory depression) ○ changes in alertness (drowsiness) ○ coma ○ death Call your doctor right away if you have any of these serious side effects. ● Anyone who takes LUMRYZ should not do anything that requires them to be fully awake or is dangerous, including driving a car, using heavy machinery, or flying an airplane, for at least 6 hours after taking LUMRYZ. Those activities should not be done until you know how LUMRYZ affects you. ● Keep LUMRYZ in a safe place to prevent abuse and misuse. Selling or giving away LUMRYZ may harm others and is against the law. Tell your doctor if you have ever abused or been dependent on alcohol, prescription medicines, or street drugs. ● Because of the risk of CNS depression, abuse, and misuse, LUMRYZ is available only by prescription and filled through certified pharmacies in the LUMRYZ REMS. You must be enrolled in the LUMRYZ REMS to receive LUMRYZ. For more information on how to receive LUMRYZ, visit www.LUMRYZREMS.com . Before you receive LUMRYZ, your doctor or pharmacist will make sure that you understand how to use LUMRYZ safely and effectively. If you have any questions about LUMRYZ, ask your doctor or call the LUMRYZ REMS at 1-877-453-1029. What is LUMRYZ? LUMRYZ is a prescription medicine used to treat the following symptoms in adults with narcolepsy: ● sudden onset of weak or paralyzed muscles (cataplexy), or ● excessive daytime sleepiness (EDS) It is not known if LUMRYZ is safe and effective in children. Do not take LUMRYZ if you: ● take other sleep medicines or sedatives (medicines that cause sleepiness) ● drink alcohol ● have a rare problem called succinic semialdehyde dehydrogenase deficiency Before taking LUMRYZ, tell your doctor about all medical conditions, including if you: ● have a history of drug abuse. ● have short periods of not breathing while sleeping (sleep apnea). ● have trouble breathing or have lung problems. You may have a higher chance of having serious breathing problems when taking LUMRYZ. ● have or had depression or have tried to harm yourself. You should be watched carefully for new symptoms of depression. ● have or had behavior or other psychiatric problems such as: ○ anxiety ○ seeing or hearing things that are not real (hallucinations) ○ feeling more suspicious (paranoia) ○ being out of touch with reality (psychosis) ○ acting aggressive ○ agitation ● have liver problems. ● are on a salt-restricted diet. LUMRYZ contains a lot of sodium (salt) and may not be right for you. ● have high blood pressure. ● have heart failure. ● have kidney problems. ● are pregnant or plan to become pregnant. It is not known if LUMRYZ can harm your unborn baby. ● are breastfeeding or plan to breastfeed. LUMRYZ passes into breast milk. You and your doctor should decide if you will take LUMRYZ or breastfeed. Tell your doctor about all the medicines you take , including prescription and over-the-counter medicines, vitamins, and herbal supplements. Especially, tell your doctor if you take other medicines to help you sleep (sedatives) or that may make you sleepy, such as some medicines to treat pain, anxiety, depression, or seizures. Know the medicines you take. Keep a list of them to show your doctor and pharmacist when you get a new medicine. How should I take LUMRYZ? ● Read the Instructions for Use at the end of this Medication Guide for detailed instructions on how to take LUMRYZ. ● Take LUMRYZ exactly as your doctor tells you to take it. ● LUMRYZ is taken by mouth 1 time at bedtime. ● Wait at least 2 hours after eating before taking LUMYRZ ● After mixing LUMRYZ, take it within 30 minutes. Do not mix LUMRYZ with hot water. ● Take LUMRYZ at bedtime while you are in bed and lie down immediately. You should remain in bed after taking LUMRYZ. ● LUMRYZ can cause physical dependence and craving for the medicine when it is not taken as directed. ● Never change the LUMRYZ dose without talking to your doctor. ● LUMRYZ can cause sleep very quickly without feeling drowsy. Some people fall asleep within 5 minutes and most fall asleep within 15 minutes. The time it takes to fall asleep might be different from night to night. ● Falling asleep quickly, including while standing or while getting up from the bed, has led to falls with injuries that have required some people to be hospitalized. ● If you take too much LUMRYZ, call your doctor or go to the nearest hospital emergency room right away. What are the possible side effects of LUMRYZ? LUMRYZ can cause serious side effects, including: ● See “What is the most important information I should know about LUMRYZ?” ● breathing problems, including: ○ slower breathing. ○ trouble breathing. ○ short periods of not breathing while sleeping (sleep apnea). People who already have breathing or lung problems have a higher chance of having breathing problems when they use LUMRYZ. ● mental health problems, including: ○ confusion ○ seeing or hearing things that are not real (hallucinations) ○ unusual or disturbing thoughts (abnormal thinking) ○ feeling anxious or upset ○ depression ○ thoughts of killing yourself or trying to kill yourself ○ increased tiredness ○ feelings of guilt or worthlessness ○ difficulty concentrating Call your doctor right away if you have symptoms of mental health problems, or a change in weight or appetite. ● sleepwalking. Sleepwalking can cause injuries. Call your doctor if you start sleepwalking. Your doctor should check you. The most common side effects of LUMRYZ in adults include: ○ nausea ○ dizziness ○ bedwetting ○ headache ○ vomiting Side effects may increase when taking higher doses of LUMRYZ. These are not all the possible side effects of LUMRYZ. For more information, ask your doctor or pharmacist. 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 LUMRYZ? ● Store LUMRYZ in the original packet prior to mixing with water. After mixing with water, store LUMRYZ in the mixing cup provided in each kit. ● Store LUMRYZ at room temperature between 68°F to 77°F (20°C to 25°C). ● LUMRYZ suspension should be taken within 30 minutes of preparation. ● When you have finished using the LUMRYZ packet, throw it away (dispose of it) in the trash. LUMRYZ comes in a child-resistant package. Keep LUMRYZ and all medicines out of the reach of children and pets. General information about the safe and effective use of LUMRYZ. Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use LUMRYZ for a condition for which it was not prescribed. Do not give LUMRYZ to other people, even if they have the same symptoms. It may harm them. You can ask your pharmacist or doctor for information about LUMRYZ that is written for health professionals. What are the ingredients in LUMRYZ? Active ingredients: sodium oxybate Inactive ingredients: carrageenan, hydrogenated vegetable oil, hydroxyethyl cellulose, magnesium stearate, malic acid, methacrylic acid copolymer, microcrystalline cellulose, povidone, xanthan gum. Distributed By: Avadel CNS Pharmaceuticals, LLC Chesterfield, MO 63005 For more information, go to www.LUMRYZREMS.com or call the LUMRYZ REMS at 1-877-453-1029.

14 CLINICAL STUDIES The effectiveness of LUMRYZ for the treatment of cataplexy or excessive daytime sleepiness (EDS) in adults with narcolepsy has been established based on a double-blind, randomized, placebo-controlled, two-arm multi-center study to assess the efficacy and safety of a once nightly administration of LUMRYZ in patients with narcolepsy (Study 1; NCT02720744 ). A total of 212 patients were randomized to receive LUMRYZ or placebo in a 1:1 ratio and received at least one dose of study drug. The study was divided into four sequential study periods, and incorporated dose titration to stabilized dose administration of LUMRYZ (4.5 g, 6 g, 7.5 g, and 9 g). There was a three-week screening period, a 13-week treatment period including up-titration over a period of eight weeks, five weeks of stable dosing at 9 g/night, and a one-week follow-up period. Patients could be on concomitant stimulant as long as dosage was stable for 3 weeks prior to study start. The three co-primary endpoints were the Maintenance of Wakefulness Test (MWT), Clinical Global Impression-Improvement (CGI-I), and mean change in weekly cataplexy attacks. The MWT measures latency to sleep onset (in minutes), averaged over five sessions at 2-hour intervals following nocturnal polysomnography. For each test session, patients were instructed to remain awake for as long as possible during 30-minute test sessions, and sleep latency was determined as the number of minutes patients could remain awake. The overall score was the mean sleep latency for the 5 sessions. The CGI-I was evaluated on a 7-point scale, centered at No Change, and ranging from Very Much Worse to Very Much Improved . Patients were rated by evaluators who based their assessments on the severity of narcolepsy at Baseline. Demographic and mean baseline characteristics were similar for the LUMRYZ and placebo groups. A total of 76% were narcolepsy type 1 (NT1; with both symptoms of EDS and cataplexy) patients, and 24% were narcolepsy type 2 (NT2; with symptoms of EDS and without cataplexy) patients. The mean age was 31 years, and 68% were female. Approximately 63% of patients were on concomitant stimulant use. The mean MWT at baseline was 5 minutes for the LUMRYZ group, and 4.7 minutes for the placebo group. The mean number of cataplexy attacks per week at baseline was 18.9 in the LUMRYZ group and 19.8 in the placebo group. A statistically significant improvement was seen on the MWT, CGI-I, and mean weekly cataplexy attacks, for the 6 g (Week 3), 7.5 g (Week 8), and 9 g (Week 13) dose of LUMRYZ, compared to the placebo group (see Table 3, Table 4, and Table 5). Table 3: Change from Baseline in the Maintenance of Wakefulness Test *Mean MWT at baseline was 5.0 minutes for the LUMRYZ group and 4.7 minutes for the placebo group Dose Treatment Group (N) Change from Baseline (Minutes)* Difference from Placebo [95% CI] p-value 6 g (Week 3) LUMRYZ (87) 8.1 5.0 [2.90;7.05] <0.001 Placebo (88) 3.1 7.5 g (Week 8) LUMRYZ (76) 9.6 6.2 [3.84;8.58] <0.001 Placebo (78) 3.3 9 g (Week 13) LUMRYZ (68) 10.8 6.1 [3.52;8.75] <0.001 Placebo (78) 4.7 Table 4: Proportion of Patients with a Very Much or Much Improved Clinical Global Impression-Improvement Dose Treatment Group (N) Percentage of Responders (Much or Very Much Improved) Odds Ratio [95% CI] p-value 6 g (Week 3) LUMRYZ (87) 40 10.3 [3.93;26.92] <0.001 Placebo (87) 6 - - 7.5 g (Week 8) LUMRYZ (75) 64 5.7 [2.82;11.40] <0.001 Placebo (81) 22 - - 9 g (Week 13) LUMRYZ (69) 73 5.6 [2.76;11.23] <0.001 Placebo (79) 32 - - Table 5: Change from Baseline in the Mean Cataplexy Attacks Per Week in NT1 Patients *Mean (SD) number of cataplexy attacks per week at baseline was 18.9 (8.7) in the LUMRYZ group and 19.8 (8.9) in the placebo group Dose Treatment Group (N) Change from Baseline * Difference from Placebo [95% CI] p-value 6 g (Week 3) LUMRYZ (73) -7.4 -4.8 [-7.03;-2.62] <0.001 Placebo (72) -2.6 - - 7.5 g (Week 8) LUMRYZ (66) -10.0 -6.3 [-8.74;-3.80] <0.001 Placebo (69) -3.7 - - 9 g (Week 13) LUMRYZ (55) -11.5 -6.7 [-9.32;-3.98] <0.001 Placebo (62) -4.9 - -

8 USE IN SPECIFIC POPULATIONS • Pregnancy: Based on animal data, may cause fetal harm ( 8.1 ). • Geriatric patients: Monitor for impaired motor and/or cognitive function when taking LUMRYZ ( 8.5 ). • Hepatic Impairment: Because of an increase in exposure, LUMRYZ should not be initiated in patients with hepatic impairment because appropriate dosage adjustments for initiation of LUMRYZ cannot be made ( 8.6 ). 8.1 Pregnancy Risk Summary There are no adequate data on the developmental risk associated with the use of sodium oxybate in pregnant women. Oral administration of sodium oxybate to pregnant rats (150, 350, or 1,000 mg/kg/day) or rabbits (300, 600, or 1,200 mg/kg/day) throughout organogenesis produced no clear evidence of developmental toxicity; however, oral administration to rats throughout pregnancy and lactation resulted in increased stillbirths and decreased offspring postnatal viability and growth, at a clinically relevant dose [see Data] . 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. The background risk of major birth defects and miscarriage for the indicated population is unknown. Clinical Considerations Labor or Delivery LUMRYZ has not been studied in labor or delivery. In obstetric anesthesia using an injectable formulation of sodium oxybate, newborns had stable cardiovascular and respiratory measures but were very sleepy, causing a slight decrease in Apgar scores. There was a fall in the rate of uterine contractions 20 minutes after injection. Placental transfer is rapid and gamma-hydroxybutyrate (GHB) has been detected in newborns at delivery after intravenous administration of GHB to mothers. Subsequent effects of sodium oxybate on later growth, development, and maturation in humans are unknown. Data Animal Data Oral administration of sodium oxybate to pregnant rats (150, 350, or 1,000 mg/kg/day) or rabbits (300, 600, or 1,200 mg/kg/day) throughout organogenesis produced no clear evidence of developmental toxicity. The highest doses tested in rats and rabbits were approximately 1 and 3 times, respectively, the maximum recommended human dose (MRHD) of 9 g per night on a body surface area (mg/m 2 ) basis. Oral administration of sodium oxybate (150, 350, or 1,000 mg/kg/day) to rats throughout pregnancy and lactation resulted in increased stillbirths and decreased offspring postnatal viability and body weight gain at the highest dose tested. The no-effect dose for pre- and postnatal developmental toxicity in rats is less than the MRHD on a mg/m 2 basis. 8.2 Lactation Risk Summary GHB is excreted in human milk after oral administration of sodium oxybate. There is insufficient information on the risk to a breastfed infant, and there is insufficient information on milk production in nursing mothers. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for LUMRYZ and any potential adverse effects on the breastfed infant from LUMRYZ or from the underlying maternal condition. 8.4 Pediatric Use Safety and effectiveness of LUMRYZ in pediatric patients have not been established. Juvenile Animal Toxicity Data In a study in which sodium oxybate (0, 100, 300, or 900 mg/kg/day) was orally administered to rats during the juvenile period of development (postnatal days 21 through 90), mortality was observed at the two highest doses tested. Deaths occurred during the first week of dosing and were associated with clinical signs (including decreased activity and respiratory rate) consistent with the pharmacological effects of the drug. Reduced body weight gain in males and females and delayed sexual maturation in males were observed at the highest dose tested. 8.5 Geriatric Use Clinical studies of LUMRYZ or immediate-release sodium oxybate in patients with narcolepsy did not include sufficient numbers of subjects age 65 years and older to determine whether they respond differently from younger subjects. In controlled trials of immediate-release sodium oxybate in another population, 39 (5%) of 874 patients were 65 years or older. Discontinuations of treatment due to adverse reactions were increased in the elderly compared to younger adults (21% vs. 19%). Frequency of headaches was markedly increased in the elderly (39% vs. 19%). The most common adverse reactions were similar in both age categories. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy. 8.6 Hepatic Impairment Because of an increase in exposure to LUMRYZ, LUMRYZ should not be initiated in patients with hepatic impairment because appropriate dosage adjustments for initiation of LUMRYZ cannot be made with the available dosage strengths [see Clinical Pharmacology (12.3) ] . Patients with hepatic impairment who have been titrated to a maintenance dosage of another oxybate product can be switched to LUMRYZ if the appropriate dosage strength is available.

16 HOW SUPPLIED/STORAGE AND HANDLING 16.1 How Supplied LUMRYZ is a blend of white to off-white granules for extended-release oral suspension in water. Each carton contains either 7 or 30 packets of LUMRYZ, a mixing cup, Prescribing Information and Medication Guide, and Instructions for Use. Dose packets contain a single dose of LUMRYZ provided in 4.5 g, 6 g, 7.5 g, or 9 g doses. Strength Package Size NDC Number 4.5 g 7 packets NDC 13551-001-07 30 packets NDC 13551-001-30 6 g 7 packets NDC 13551-002-07 30 packets NDC 13551-002-30 7.5 g 7 packets NDC 13551-003-07 30 packets NDC 13551-003-30 9 g 7 packets NDC 13551-004-07 30 packets NDC 13551-004-30 16.2 Storage Keep out of reach of children. LUMRYZ should be stored at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) (see USP Controlled Room Temperature). Suspensions should be consumed within 30 minutes. 16.3 Handling and Disposal LUMRYZ is a Schedule III drug under the Controlled Substances Act. LUMRYZ should be handled according to state and federal regulations. It is safe to dispose of LUMRYZ down the sanitary sewer.

WARNING: CENTRAL NERVOUS SYSTEM (CNS) DEPRESSION AND ABUSE AND MISUSE Central Nervous System Depression LUMRYZ (sodium oxybate) is a CNS depressant. Clinically significant respiratory depression and obtundation may occur in patients treated with LUMRYZ at recommended doses [see Warnings and Precautions (5.1) ] . Many patients who received sodium oxybate during clinical trials in narcolepsy were receiving central nervous system stimulants [see Clinical Trials (14) ] . Abuse and Misuse LUMRYZ (sodium oxybate) is the sodium salt of gamma-hydroxybutyrate (GHB). Abuse or misuse of illicit GHB, either alone or in combination with other CNS depressants, is associated with CNS adverse reactions, including seizure, respiratory depression, decreases in the level of consciousness, coma, and death [see Warnings and Precautions (5.2) ] . Because of the risks of CNS depression and abuse and misuse, LUMRYZ is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS) called the LUMRYZ REMS [see Warnings and Precautions (5.3) ]. WARNING: CENTRAL NERVOUS SYSTEM (CNS) DEPRESSION AND ABUSE AND MISUSE See full prescribing information for complete boxed warning. Central Nervous System Depression • LUMRYZ is a CNS depressant, and respiratory depression can occur with LUMRYZ use ( 5.1 , 5.4 ) Abuse and Misuse • LUMRYZ is the sodium salt of gamma-hydroxybutyrate (GHB). Abuse or misuse of illicit GHB is associated with CNS adverse reactions, including seizure, respiratory depression, decreased consciousness, coma, and death ( 5.2 , 9.2 ) LUMRYZ is available only through a restricted program called the LUMRYZ REMS ( 5.3 )