Relpax

6 ADVERSE REACTIONS The following adverse reactions are described elsewhere in other sections of the prescribing information: • Myocardial ischemia and myocardial infarction, and Prinzmetal's angina [see Warnings and Precautions (5.2) ] • Arrhythmias [see Warnings and Precautions (5.3) ] • Chest, throat, neck, and/or jaw pain/tightness/pressure [see Warnings and Precautions (5.4) ] • Cerebrovascular events [see Warnings and Precautions (5.4) ] • Other vasospasm reactions [see Warnings and Precautions (5.5) ] • Medication overuse headache [see Warnings and Precautions (5.6) ] • Serotonin syndrome [see Warnings and Precautions (5.7) ] • Increase in blood pressure [see Warnings and Precautions (5.8) ] • Hypersensitivity reactions [see Contraindications (4) and Warnings and Precautions (5.9) ] Most common adverse reactions (≥ 5% and > placebo) were asthenia, nausea, dizziness, and somnolence. These reactions appear to be dose-related. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Pfizer Inc at 1-800-438-1985 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice. Among 4,597 patients who treated the first migraine headache with RELPAX in short-term placebo-controlled trials, the most common adverse reactions reported with treatment with RELPAX were asthenia, nausea, dizziness, and somnolence. These reactions appear to be dose-related. In long-term open-label studies where patients were allowed to treat multiple migraine attacks for up to 1 year, 128 (8.3%) out of 1,544 patients discontinued treatment due to adverse reactions. Table 1 lists adverse reactions that occurred in the subset of 5,125 migraineurs who received eletriptan doses of 20 mg, 40 mg and 80 mg or placebo in worldwide placebo-controlled clinical trials. Only adverse reactions that were more frequent in a RELPAX treatment group compared to the placebo group with an incidence greater than or equal to 2% are included in Table 1. Table 1: Adverse Reactions Incidence in Placebo-Controlled Migraine Clinical Trials: Reactions Reported by ≥ 2% Patients Treated with RELPAX and More Than Placebo Adverse Reaction Type Placebo (n=988) RELPAX 20 mg (n=431) RELPAX 40 mg (n=1774) RELPAX 80 mg (n=1932) ATYPICAL SENSATIONS Paresthesia 2% 3% 3% 4% Flushing/feeling of warmth 2% 2% 2% 2% PAIN AND PRESSURE SENSATIONS Chest – tightness/pain/pressure 1% 1% 2% 4% Abdominal – pain/discomfort/stomach pain/ cramps/pressure 1% 1% 2% 2% DIGESTIVE Dry mouth 2% 2% 3% 4% Dyspepsia 1% 1% 2% 2% Dysphagia – throat tightness/difficulty swallowing 0.2% 1% 2% 2% Nausea 5% 4% 5% 8% NEUROLOGICAL Dizziness 3% 3% 6% 7% Somnolence 4% 3% 6% 7% Headache 3% 4% 3% 4% OTHER Asthenia 3% 4% 5% 10% The frequency of adverse reactions in clinical trials did not increase when up to 2 doses of RELPAX were taken within 24 hours. The incidence of adverse reactions in controlled clinical trials was not affected by gender, age, or race of the patients. Adverse reaction frequencies were also unchanged by concomitant use of drugs commonly taken for migraine prophylaxis (e.g., SSRIs, beta blockers, calcium channel blockers, tricyclic antidepressants), estrogen replacement therapy or oral contraceptives. 6.2 Postmarketing Experience The following adverse reaction(s) have been identified during post approval use of RELPAX. 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. Neurological: seizure Digestive: vomiting

4 CONTRAINDICATIONS RELPAX is contraindicated in patients with: • Ischemic coronary artery disease (CAD) (angina pectoris, history of myocardial infarction, or documented silent ischemia) or coronary artery vasospasm, including Prinzmetal's angina [see Warnings and Precautions (5.1) ]. • Wolff-Parkinson-White syndrome or arrhythmias associated with other cardiac accessory conduction pathway disorders [see Warnings and Precautions (5.2) ]. • History of stroke, transient ischemic attack (TIA), or history or current evidence of hemiplegic or basilar migraine because these patients are at a higher risk of stroke [see Warnings and Precautions (5.4) ]. • Peripheral vascular disease [see Warnings and Precautions (5.5) ]. • Ischemic bowel disease [see Warnings and Precautions (5.5) ]. • Uncontrolled hypertension [see Warnings and Precautions (5.8) ]. • Recent use (i.e., within 24 hours) of another 5-hydroxytryptamine 1 (5-HT 1 ) agonist, ergotamine-containing medication, or ergot-type medication such as dihydroergotamine (DHE) or methysergide [see Drug Interactions (7.1) ] . • Hypersensitivity to RELPAX (angioedema and anaphylaxis seen) [see Warnings and Precautions (5.9) ]. • Recent use (i.e., within at least 72 hours) of the following potent CYP3A4 inhibitors: ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir, or nelfinavir [see Drug Interactions (7.2) and Clinical Pharmacology (12.3) ]. • History of coronary artery disease (CAD) or coronary artery vasospasm ( 4 ) • Wolff-Parkinson-White syndrome or other cardiac accessory conduction pathway disorders ( 4 ) • History of stroke, transient ischemic attack, or history or current evidence of hemiplegic or basilar migraine ( 4 ) • Peripheral vascular disease ( 4 ) • Ischemic bowel disease ( 4 ) • Uncontrolled hypertension ( 4 ) • Within 24 hours of treatment with another 5-HT 1 agonist, or an ergotamine-containing medication ( 4 ) • Hypersensitivity to RELPAX (angioedema and anaphylaxis seen) ( 4 ) • Within at least 72 hours of treatment with the following potent CYP3A4 inhibitors: ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir, or nelfinavir ( 4 )

11 DESCRIPTION RELPAX (eletriptan hydrobromide) tablets contain eletriptan hydrobromide, which is a selective 5-hydroxytryptamine 1B/1D (5-HT1B/1D) receptor agonist. Eletriptan hydrobromide is chemically designated as (R)-3-[(1-Methyl-2-pyrrolidinyl)methyl]-5-[2-(phenylsulfonyl)ethyl]-1H-indole monohydrobromide, and it has the following chemical structure: The empirical formula is C 22 H 26 N 2 O 2 S . HBr, representing a molecular weight of 463.43. Eletriptan hydrobromide is a white to light pale colored powder that is readily soluble in water. Each RELPAX Tablet for oral administration contains 24.2 or 48.5 mg of eletriptan hydrobromide equivalent to 20 mg or 40 mg of eletriptan, respectively. Each tablet also contains the inactive ingredients microcrystalline cellulose NF, lactose monohydrate NF, croscarmellose sodium NF, magnesium stearate NF, titanium dioxide USP, hypromellose, triacetin USP and FD&C Yellow No. 6 aluminum lake. Chemical Structure

2 DOSAGE AND ADMINISTRATION The maximum recommended single dose is 40 mg. In controlled clinical trials, single doses of 20 mg and 40 mg were effective for the acute treatment of migraine in adults. A greater proportion of patients had a response following a 40 mg dose than following a 20 mg dose [see Clinical Studies (14) ] . If the migraine has not resolved by 2 hours after taking RELPAX, or returns after transient improvement, a second dose may be administered at least 2 hours after the first dose. The maximum daily dose should not exceed 80 mg. The safety of treating an average of more than 3 migraine attacks in a 30-day period has not been established. • Single dose: 20 mg or 40 mg ( 2 ) • Maximum single dose: 40 mg ( 2 ) • May repeat dose after 2 hours if needed; not to exceed 80 mg in any 24-hour period ( 2 )

1 INDICATIONS AND USAGE RELPAX is indicated for the acute treatment of migraine with or without aura in adults. RELPAX is a serotonin (5-HT 1B/1D ) receptor agonist (triptan) indicated for the acute treatment of migraine with or without aura in adults ( 1 ) Limitations of Use: • Use only after a clear diagnosis of migraine has been established ( 1 ) • Not indicated for the prophylactic therapy of migraine ( 1 ) • Not indicated for the treatment of cluster headache ( 1 ) Limitations of Use: • Use only if a clear diagnosis of migraine has been established. If a patient has no response to the first migraine attack treated with RELPAX, reconsider the diagnosis of migraine before RELPAX is administered to treat any subsequent attacks. • RELPAX is not intended for the prevention of migraine attacks. • Safety and effectiveness of RELPAX have not been established for cluster headache.

10 OVERDOSAGE The elimination half-life of eletriptan is about 4 hours [see Clinical Pharmacology (12.3) ] , therefore monitoring of patients after overdose with eletriptan should continue for at least 20 hours or longer while symptoms or signs persist. There is no specific antidote to eletriptan. It is unknown what effect hemodialysis or peritoneal dialysis has on the serum concentration of eletriptan.

7 DRUG INTERACTIONS 7.1 Ergot-Containing Drugs Including Other 5-HT 1B/1D Agonists Ergot-containing drugs have been reported to cause prolonged vasospastic reactions. Because these effects may be additive, use of ergotamine-containing or ergot-type medications (like dihydroergotamine [DHE] or methysergide) and RELPAX within 24 hours of each other is contraindicated . Concomitant use of other 5-HT 1 agonists within 24 hours of RELPAX treatment is contraindicated [see Contraindications (4) ] . 7.2 CYP3A4 Inhibitors Potent CYP3A4 inhibitors significantly increase the exposure of RELPAX. RELPAX should not be used within at least 72 hours of treatment with potent CYP3A4 inhibitors [see Contraindications (4) and Clinical Pharmacology (12.3) ] . 7.3 Selective Serotonin Reuptake Inhibitors/Serotonin and Norepinephrine Reuptake Inhibitors and Serotonin Syndrome Cases of serotonin syndrome have been reported during co-administration of triptans and SSRIs, SNRIs, TCAs and MAO inhibitors [see Warnings and Precautions (5.7) ].

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Eletriptan binds with high affinity to 5-HT 1B , 5-HT 1D and 5-HT 1F receptors, has modest affinity for 5-HT 1A , 5-HT 1E , 5-HT 2B and 5-HT 7 receptors. Migraines are likely due to local cranial vasodilatation and/or to the release of sensory neuropeptides (vasoactive intestinal peptide, substance P and calcitonin gene-related peptide) through nerve endings in the trigeminal system. The therapeutic activity of RELPAX for the treatment of migraine headache is thought to be due to the agonist effects at the 5-HT 1B/1D receptors on intracranial blood vessels (including the arterio-venous anastomoses) and sensory nerves of the trigeminal system which result in cranial vessel constriction and inhibition of pro-inflammatory neuropeptide release. 12.3 Pharmacokinetics Absorption: Eletriptan is well absorbed after oral administration with peak plasma levels occurring approximately 1.5 hours after dosing to healthy subjects. In patients with moderate to severe migraine the median T max is 2.0 hours. The mean absolute bioavailability of eletriptan is approximately 50%. The oral pharmacokinetics are slightly more than dose-proportional over the clinical dose range. The AUC and C max of eletriptan are increased by approximately 20 to 30% following oral administration with a high fat meal. RELPAX can be taken with or without food. Distribution: The volume of distribution of eletriptan following IV administration is 138L. Plasma protein binding is moderate and approximately 85%. Metabolism: The N-demethylated metabolite of eletriptan is the only known active metabolite. This metabolite causes vasoconstriction similar to eletriptan in animal models. Though the half-life of the metabolite is estimated to be about 13 hours, the plasma concentration of the N-demethylated metabolite is 10–20% of parent drug and is unlikely to contribute significantly to the overall effect of the parent compound. In vitro studies indicate that eletriptan is primarily metabolized by cytochrome P-450 enzyme CYP3A4 [see Contraindications (4) and Drug Interactions (7.2) ] . Elimination: The terminal elimination half-life of eletriptan is approximately 4 hours. Mean renal clearance (CL R ) following oral administration is approximately 3.9 L/h. Non-renal clearance accounts for about 90% of the total clearance. Specific Populations Age: The pharmacokinetics of eletriptan are generally unaffected by age. Blood pressure was increased to a greater extent in elderly subjects than in young subjects [see Use in Specific Populations (8.5) ] . The pharmacokinetic disposition of eletriptan in the elderly is similar to that seen in younger adults. There is a statistically significant increased half-life (from about 4.4 hours to 5.7 hours) between elderly (65 to 93 years of age) and younger adult subjects (18 to 45 years of age) [see Use in Specific Populations (8.5) ] . Gender: The pharmacokinetics of eletriptan are unaffected by gender. Race: A comparison of pharmacokinetic studies run in western countries with those run in Japan has indicated an approximate 35% reduction in the exposure of eletriptan in Japanese male volunteers compared to western males. Population pharmacokinetic analysis of two clinical studies indicates no evidence of pharmacokinetic differences between Caucasians and non-Caucasian patients. Menstrual Cycle: In a study of 16 healthy females, the pharmacokinetics of eletriptan remained consistent throughout the phases of the menstrual cycle. Renal Impairment: There was no significant change in clearance observed in subjects with mild, moderate or severe renal impairment, though blood pressure elevations were observed in this population [see Warnings and Precautions (5.8) ] . Hepatic Impairment: Subjects with mild or moderate hepatic impairment demonstrated an increase in both AUC (34%) and half-life. The C max was increased by 18%. No dose adjustment is necessary in subjects with mild or moderate hepatic impairment. The effects of severe hepatic impairment on eletriptan metabolism have not been evaluated [see Use in Specific Populations (8.6) ] . Drug Interaction Studies CYP3A4 inhibitors: In vitro studies have shown that eletriptan is metabolized by the CYP3A4 enzyme. A clinical study demonstrated about a 3-fold increase in C max and about a 6-fold increase in the AUC of eletriptan when combined with ketoconazole. The half-life increased from 5 hours to 8 hours and the T max increased from 2.8 hours to 5.4 hours. Another clinical study demonstrated about a 2-fold increase in C max and about a 4-fold increase in AUC when erythromycin was co-administered with eletriptan. It has also been shown that co-administration of verapamil and eletriptan yields about a 2-fold increase in C max and about a 3-fold increase in AUC of eletriptan, and that co-administration of fluconazole and eletriptan yields about a 1.4-fold increase in C max and about a 2-fold increase in AUC of eletriptan. RELPAX is contraindicated within at least 72 hours of treatment with the following potent CYP3A4 inhibitors: ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir and nelfinavir. RELPAX should not be used within 72 hours with drugs that have demonstrated potent CYP3A4 inhibition [see Contraindications (4) ] . Propranolol: The C max and AUC of eletriptan were increased by 10 and 33%, respectively, in the presence of propranolol. No interactive increases in blood pressure were observed. No dosage adjustment appears to be needed for patients taking propranolol. The effect of eletriptan on other drugs: The effect of eletriptan on enzymes other than cytochrome P450 has not been investigated. In vitro human liver microsome studies suggest that eletriptan has little potential to inhibit CYP1A2, 2C9, 2E1 and 3A4 at concentrations up to 100 µM. While eletriptan has an effect on CYP2D6 at high concentration, this effect should not interfere with metabolism of other drugs when eletriptan is used at recommended doses. There is no in vitro or in vivo evidence that clinical doses of eletriptan will induce drug metabolizing enzymes. Therefore, eletriptan is unlikely to cause clinically important drug interactions mediated by these enzymes.

12.1 Mechanism of Action Eletriptan binds with high affinity to 5-HT 1B , 5-HT 1D and 5-HT 1F receptors, has modest affinity for 5-HT 1A , 5-HT 1E , 5-HT 2B and 5-HT 7 receptors. Migraines are likely due to local cranial vasodilatation and/or to the release of sensory neuropeptides (vasoactive intestinal peptide, substance P and calcitonin gene-related peptide) through nerve endings in the trigeminal system. The therapeutic activity of RELPAX for the treatment of migraine headache is thought to be due to the agonist effects at the 5-HT 1B/1D receptors on intracranial blood vessels (including the arterio-venous anastomoses) and sensory nerves of the trigeminal system which result in cranial vessel constriction and inhibition of pro-inflammatory neuropeptide release.

12.3 Pharmacokinetics Absorption: Eletriptan is well absorbed after oral administration with peak plasma levels occurring approximately 1.5 hours after dosing to healthy subjects. In patients with moderate to severe migraine the median T max is 2.0 hours. The mean absolute bioavailability of eletriptan is approximately 50%. The oral pharmacokinetics are slightly more than dose-proportional over the clinical dose range. The AUC and C max of eletriptan are increased by approximately 20 to 30% following oral administration with a high fat meal. RELPAX can be taken with or without food. Distribution: The volume of distribution of eletriptan following IV administration is 138L. Plasma protein binding is moderate and approximately 85%. Metabolism: The N-demethylated metabolite of eletriptan is the only known active metabolite. This metabolite causes vasoconstriction similar to eletriptan in animal models. Though the half-life of the metabolite is estimated to be about 13 hours, the plasma concentration of the N-demethylated metabolite is 10–20% of parent drug and is unlikely to contribute significantly to the overall effect of the parent compound. In vitro studies indicate that eletriptan is primarily metabolized by cytochrome P-450 enzyme CYP3A4 [see Contraindications (4) and Drug Interactions (7.2) ] . Elimination: The terminal elimination half-life of eletriptan is approximately 4 hours. Mean renal clearance (CL R ) following oral administration is approximately 3.9 L/h. Non-renal clearance accounts for about 90% of the total clearance. Specific Populations Age: The pharmacokinetics of eletriptan are generally unaffected by age. Blood pressure was increased to a greater extent in elderly subjects than in young subjects [see Use in Specific Populations (8.5) ] . The pharmacokinetic disposition of eletriptan in the elderly is similar to that seen in younger adults. There is a statistically significant increased half-life (from about 4.4 hours to 5.7 hours) between elderly (65 to 93 years of age) and younger adult subjects (18 to 45 years of age) [see Use in Specific Populations (8.5) ] . Gender: The pharmacokinetics of eletriptan are unaffected by gender. Race: A comparison of pharmacokinetic studies run in western countries with those run in Japan has indicated an approximate 35% reduction in the exposure of eletriptan in Japanese male volunteers compared to western males. Population pharmacokinetic analysis of two clinical studies indicates no evidence of pharmacokinetic differences between Caucasians and non-Caucasian patients. Menstrual Cycle: In a study of 16 healthy females, the pharmacokinetics of eletriptan remained consistent throughout the phases of the menstrual cycle. Renal Impairment: There was no significant change in clearance observed in subjects with mild, moderate or severe renal impairment, though blood pressure elevations were observed in this population [see Warnings and Precautions (5.8) ] . Hepatic Impairment: Subjects with mild or moderate hepatic impairment demonstrated an increase in both AUC (34%) and half-life. The C max was increased by 18%. No dose adjustment is necessary in subjects with mild or moderate hepatic impairment. The effects of severe hepatic impairment on eletriptan metabolism have not been evaluated [see Use in Specific Populations (8.6) ] . Drug Interaction Studies CYP3A4 inhibitors: In vitro studies have shown that eletriptan is metabolized by the CYP3A4 enzyme. A clinical study demonstrated about a 3-fold increase in C max and about a 6-fold increase in the AUC of eletriptan when combined with ketoconazole. The half-life increased from 5 hours to 8 hours and the T max increased from 2.8 hours to 5.4 hours. Another clinical study demonstrated about a 2-fold increase in C max and about a 4-fold increase in AUC when erythromycin was co-administered with eletriptan. It has also been shown that co-administration of verapamil and eletriptan yields about a 2-fold increase in C max and about a 3-fold increase in AUC of eletriptan, and that co-administration of fluconazole and eletriptan yields about a 1.4-fold increase in C max and about a 2-fold increase in AUC of eletriptan. RELPAX is contraindicated within at least 72 hours of treatment with the following potent CYP3A4 inhibitors: ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir and nelfinavir. RELPAX should not be used within 72 hours with drugs that have demonstrated potent CYP3A4 inhibition [see Contraindications (4) ] . Propranolol: The C max and AUC of eletriptan were increased by 10 and 33%, respectively, in the presence of propranolol. No interactive increases in blood pressure were observed. No dosage adjustment appears to be needed for patients taking propranolol. The effect of eletriptan on other drugs: The effect of eletriptan on enzymes other than cytochrome P450 has not been investigated. In vitro human liver microsome studies suggest that eletriptan has little potential to inhibit CYP1A2, 2C9, 2E1 and 3A4 at concentrations up to 100 µM. While eletriptan has an effect on CYP2D6 at high concentration, this effect should not interfere with metabolism of other drugs when eletriptan is used at recommended doses. There is no in vitro or in vivo evidence that clinical doses of eletriptan will induce drug metabolizing enzymes. Therefore, eletriptan is unlikely to cause clinically important drug interactions mediated by these enzymes.

20200311

21

3 DOSAGE FORMS AND STRENGTHS 20 mg Tablets : Orange, round, convex shaped, film-coated, with "PFIZER" and "REP20" debossed. 40 mg Tablets : Orange, round, convex shaped, film-coated, with "PFIZER" and "REP40" debossed. Tablets: 20 mg and 40 mg ( 3 )

Relpax eletriptan hydrobromide ELETRIPTAN HYDROBROMIDE ELETRIPTAN MICROCRYSTALLINE CELLULOSE LACTOSE MONOHYDRATE CROSCARMELLOSE SODIUM MAGNESIUM STEARATE TITANIUM DIOXIDE HYPROMELLOSE, UNSPECIFIED TRIACETIN FD&C YELLOW NO. 6 ALUMINUM OXIDE REP20;Pfizer Relpax eletriptan hydrobromide ELETRIPTAN HYDROBROMIDE ELETRIPTAN MICROCRYSTALLINE CELLULOSE LACTOSE MONOHYDRATE CROSCARMELLOSE SODIUM MAGNESIUM STEARATE TITANIUM DIOXIDE HYPROMELLOSE, UNSPECIFIED TRIACETIN FD&C YELLOW NO. 6 ALUMINUM OXIDE REP40;Pfizer

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis Eletriptan was administered to rats and mice in the diet for 104 weeks. In rats, the incidence of testicular interstitial cell adenomas was increased at the high dose of 75 mg/kg/day, but not at 15 mg/kg/day, a dose associated with plasma exposures (AUC) approximately 2 times that in humans at the MRHD of 80 mg/day. In mice, the incidence of hepatocellular adenomas was increased at the high dose of 400 mg/kg/day, but not a dose of 90 mg/kg/day, associated with plasma AUC approximately 7 times that in humans at the MRHD. Mutagenesis Eletriptan was negative in in vitro (bacteria reverse mutation (Ames), mammalian cell gene mutation (CHO/ HGPRT), chromosomal aberration assay in human lymphocytes) and in vivo (mouse micronucleus) assays. Impairment of Fertility In a fertility and early embryonic development study, eletriptan (50, 100, or 200 mg/kg/day) was orally administered to male and female rats prior to and throughout mating and continuing in females to implantation. Plasma exposures (AUC) were 4, 8 and 16 times in males and 7, 14 and 28 times in females, respectively, that in humans at the MRHD. Prolongation of the estrous cycle and decreases in the number of corpora lutea, implants, and viable fetuses per dam were observed at 200 mg/kg/day. Male fertility parameters were not affected.

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis Eletriptan was administered to rats and mice in the diet for 104 weeks. In rats, the incidence of testicular interstitial cell adenomas was increased at the high dose of 75 mg/kg/day, but not at 15 mg/kg/day, a dose associated with plasma exposures (AUC) approximately 2 times that in humans at the MRHD of 80 mg/day. In mice, the incidence of hepatocellular adenomas was increased at the high dose of 400 mg/kg/day, but not a dose of 90 mg/kg/day, associated with plasma AUC approximately 7 times that in humans at the MRHD. Mutagenesis Eletriptan was negative in in vitro (bacteria reverse mutation (Ames), mammalian cell gene mutation (CHO/ HGPRT), chromosomal aberration assay in human lymphocytes) and in vivo (mouse micronucleus) assays. Impairment of Fertility In a fertility and early embryonic development study, eletriptan (50, 100, or 200 mg/kg/day) was orally administered to male and female rats prior to and throughout mating and continuing in females to implantation. Plasma exposures (AUC) were 4, 8 and 16 times in males and 7, 14 and 28 times in females, respectively, that in humans at the MRHD. Prolongation of the estrous cycle and decreases in the number of corpora lutea, implants, and viable fetuses per dam were observed at 200 mg/kg/day. Male fertility parameters were not affected.

NDA021016

Relpax

eletriptan hydrobromide

0049-2330

HUMAN PRESCRIPTION DRUG

ORAL

PRINCIPAL DISPLAY PANEL - 20 mg Tablet Blister Pack Relpax ® 20mg (eletriptan HBr) Tablet PFIZER INC LOT: XXXXXXX EXP: YYYY MMM TO REMOVE TABLET 1. SEPARATE ALONG PERFORATION 2. PEEL BACK PAPER AT ARROW 3. PUSH TABLET THROUGH FOIL 420839903 PRINCIPAL DISPLAY PANEL - 20 mg Tablet Blister Pack

LAB-0076-22.0 Logo

17 PATIENT COUNSELING INFORMATION See FDA Approved Patient Labeling (Patient Information) Myocardial Ischemia and/or Infarction, Prinzmetal's Angina, Other Vasospastic Reactions, and Cerebrovascular Events Inform patients that RELPAX may cause serious cardiovascular adverse reactions such as myocardial infarction or stroke, which may result in hospitalization and even death. Although serious cardiovascular reactions can occur without warning symptoms, instruct patients to be alert for the signs and symptoms of chest pain, shortness of breath, weakness, slurring of speech, and instruct them to ask for medical advice when observing any indicative sign or symptoms. Instruct patients to seek medical advice if they have symptoms of other vasospastic reactions [see Warnings and Precautions (5.1 , 5.2 , 5.4 , 5.5 , and 5.8) ]. Anaphylactic/Anaphylactoid Reactions Inform patients that anaphylactic/anaphylactoid reactions have occurred in patients receiving RELPAX. Such reactions can be life threatening or fatal. In general, anaphylactic reactions to drugs are more likely to occur in individuals with a history of sensitivity to multiple allergens [see Contraindications (4) ]. Medication Overuse Headache Inform patients that use of drugs to treat acute migraines for 10 or more days per month may lead to an exacerbation of headache, and encourage patients to record headache frequency and drug use (e.g., by keeping a headache diary) [see Warnings and Precautions (5.6) ]. Serotonin Syndrome Inform patients about the risk of serotonin syndrome with the use of RELPAX or other triptans, particularly during combined use with selective serotonin reuptake inhibitors (SSRIs) or serotonin and norepinephrine reuptake inhibitors (SNRIs) [see Warnings and Precautions (5.7) and Drug Interactions (7.3) ] . Pregnancy Advise patients to notify their healthcare provider if they become pregnant or intend to become pregnant during therapy [see Use in Specific Populations (8.1) ]. Lactation Inform patients to notify their healthcare provider if they are breastfeeding or plan to breastfeed [see Use in Specific Populations (8.2) ].

14 CLINICAL STUDIES The efficacy of RELPAX in the acute treatment of migraines was evaluated in eight randomized, double-blind placebo-controlled studies. All eight studies used 40 mg. Seven studies evaluated an 80 mg dose and two studies included a 20 mg dose. In all eight studies, randomized patients treated their headaches as outpatients. Seven studies enrolled adults and one study enrolled adolescents (age 11 to 17). Patients treated in the seven adult studies were predominantly female (85%) and Caucasian (94%) with a mean age of 40 years (range 18 to 78). In all studies, patients were instructed to treat a moderate to severe headache. Headache response, defined as a reduction in headache severity from moderate or severe pain to mild or no pain, was assessed up to 2 hours after dosing. Associated symptoms such as nausea, vomiting, photophobia and phonophobia were also assessed. Maintenance of response was assessed for up to 24 hours post dose. In the adult studies, a second dose of RELPAX or other medication was allowed 2 to 24 hours after the initial treatment for both persistent and recurrent headaches. The incidence and time to use of these additional treatments were also recorded. In the seven adult studies, the percentage of patients achieving headache response 2 hours after treatment was significantly greater among patients receiving RELPAX at all doses compared to those who received placebo. The two-hour response rates from these controlled clinical studies are summarized in Table 2. Table 2: Percentage of Patients with Headache Response (Mild or No Headache) 2 Hours Following Treatment Placebo RELPAX 20 mg RELPAX 40 mg RELPAX 80 mg NA - Not Applicable Study 1 23.8% (n=126) 54.3% p value < 0.05 vs placebo (n=129) 65.0% (n=117) 77.1% (n=118) Study 2 19.0% (n=232) NA 61.6% (n=430) 64.6% (n=446) Study 3 21.7% (n=276) 47.3% (n=273) 61.9% (n=281) 58.6% (n=290) Study 4 39.5% (n=86) NA 62.3% (n=175) 70.0% (n=170) Study 5 20.6% (n=102) NA 53.9% (n=206) 67.9% (n=209) Study 6 31.3% (n=80) NA 63.9% (n=169) 66.9% (n=160) Study 7 29.5% (n=122) NA 57.5% (n=492) NA Comparisons of the performance of different drugs based upon results obtained in different clinical trials are never reliable. Because studies are generally conducted at different times, with different samples of patients, by different investigators, employing different criteria and/or different interpretations of the same criteria, under different conditions (dose, dosing regimen, etc.), quantitative estimates of treatment response and the timing of response may be expected to vary considerably from study to study. The estimated probability of achieving an initial headache response within 2 hours following treatment is depicted in Figure 1. *Figure 1 shows the Kaplan-Meier plot of probability over time of obtaining headache response (no or mild pain) following treatment with eletriptan. The plot is based on 7 placebo-controlled, outpatient trials in adults providing evidence of efficacy (Studies 1 through 7). Patients not achieving headache response or taking additional treatment prior to 2 hours were censored at 2 hours. For patients with migraine-associated photophobia, phonophobia, and nausea at baseline, there was a decreased incidence of these symptoms following administration of RELPAX as compared to placebo. Two to 24 hours following the initial dose of study treatment, patients were allowed to use additional treatment for pain relief in the form of a second dose of study treatment or other medication. The estimated probability of taking a second dose or other medications for migraine over the 24 hours following the initial dose of study treatment is summarized in Figure 2. *This Kaplan-Meier plot is based on data obtained in 7 placebo-controlled trials in adults (Studies 1 through 7). Patients were instructed to take a second dose of study medication as follows: a) in the event of no response at 2 hours (studies 2 and 4–7) or at 4 hours (study 3); b) in the event of headache recurrence within 24 hours (studies 2–7). Patients not using additional treatments were censored at 24 hours. The plot includes both patients who had headache response at 2 hours and those who had no response to the initial dose. It should be noted that the protocols did not allow re-medication within 2 hours post dose. The efficacy of RELPAX was unaffected by the duration of attack, gender or age of the patient, relationship to menses, or concomitant use of estrogen replacement therapy/oral contraceptives or frequently used migraine prophylactic drugs. In a single study in adolescents (n=274), there were no statistically significant differences between treatment groups. The headache response rate at 2 hours was 57% for both RELPAX 40 mg Tablets and placebo. Figure 1 Figure 2

8.5 Geriatric Use Blood pressure was increased to a greater extent in elderly subjects than in young subjects. The pharmacokinetic disposition of eletriptan in the elderly is similar to that seen in younger adults [see Clinical Pharmacology (12.3) ] . In clinical trials, there were no apparent differences in efficacy or the incidence of adverse reactions between patients under 65 years of age and those 65 and above.

8.4 Pediatric Use Safety and effectiveness in pediatric patients have not been established. The efficacy of RELPAX Tablets (40 mg) in patients 11–17 was not established in a randomized, placebo-controlled trial of 274 adolescent migraineurs [see Clinical Studies (14) ] . Adverse reactions observed were similar in nature to those reported in clinical trials in adults. Postmarketing experience with other triptans includes a limited number of reports that describe pediatric patients who have experienced clinically serious adverse reactions that are similar in nature to those reported rarely in adults. Long-term safety of eletriptan was studied in 76 adolescent patients who received treatment for up to one year. A similar profile of adverse reactions to that of adults was observed. The long-term safety of eletriptan in pediatric patients has not been established.

8.1 Pregnancy Risk Summary Available human data on the use of RELPAX in pregnant women are not sufficient to draw conclusions about drug-associated risk for major birth defects and miscarriage. In animal studies, oral administration of eletriptan during pregnancy or throughout pregnancy and lactation was associated with developmental toxicity (decreased fetal and pup weights, increased incidences of fetal structural abnormalities, decreased pup viability) at clinically-relevant doses [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 reported rate of major birth defects among deliveries to women with migraine ranged from 2.2% to 2.9% and the reported rate of miscarriage was 17%, which were similar to rates reported in women without migraine. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk: Several studies have suggested that women with migraine may be at increased risk of preeclampsia and gestational hypertension during pregnancy. Data Human Data A study using linked data from the Medical Birth Registry of Norway to the Norwegian Prescription Database compared pregnancy outcomes in women who redeemed prescriptions for triptans during pregnancy, as well as a migraine disease comparison group who redeemed prescriptions for triptans before pregnancy only. Of the 189 women who redeemed prescriptions for eletriptan during the first trimester, 4 (2.1%) had infants with major congenital malformations, while for the 174 women who redeemed prescriptions for eletriptan before, but not during, pregnancy, 11 (6.3%) had infants with major congenital malformations. Methodological limitations of this study, including small size of the eletriptan population and infrequent events, do not allow for thorough characterization of risk. Animal Data When pregnant rats were administered eletriptan (0, 10, 30, or 100 mg/kg/day) during the period of organogenesis, fetal weights were decreased and the incidences of vertebral and sternebral variations were increased at 100 mg/kg/day (approximately 12 times the maximum recommended human dose [MRHD] of 80 mg/day on a mg/m 2 basis). The 30 and 100 mg/kg/day doses were also maternally toxic, as evidenced by decreased maternal body weight gain during gestation. The no-effect dose for adverse effects on embryofetal development in rats was 30 mg/kg/day, which is approximately 4 times the MRHD on a mg/m 2 basis. When eletriptan (0, 5, 10, or 50 mg/kg/day) was orally administered to pregnant rabbits throughout organogenesis, fetal weights were decreased at 50 mg/kg/day. The incidences of fused sternebrae and vena cava deviations were increased at all doses. Maternal toxicity was not evident at any dose. A no-effect dose for adverse effects on embryofetal development in rabbits was not established; the lowest dose tested (5 mg/kg/day) is similar to the MRHD on a mg/m 2 basis. Oral administration of eletriptan (0, 5, 15, or 50 mg/kg/day) to female rats throughout pregnancy and lactation resulted in a decrease in offspring viability and body weight at the highest dose tested. The no-effect dose for adverse effects on pre- and postnatal development in rats (15 mg/kg/day) is approximately 2 times the MRHD on a mg/m 2 basis.

8 USE IN SPECIFIC POPULATIONS Pregnancy: Based on animal data, may cause fetal harm ( 8.1 ) 8.1 Pregnancy Risk Summary Available human data on the use of RELPAX in pregnant women are not sufficient to draw conclusions about drug-associated risk for major birth defects and miscarriage. In animal studies, oral administration of eletriptan during pregnancy or throughout pregnancy and lactation was associated with developmental toxicity (decreased fetal and pup weights, increased incidences of fetal structural abnormalities, decreased pup viability) at clinically-relevant doses [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 reported rate of major birth defects among deliveries to women with migraine ranged from 2.2% to 2.9% and the reported rate of miscarriage was 17%, which were similar to rates reported in women without migraine. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk: Several studies have suggested that women with migraine may be at increased risk of preeclampsia and gestational hypertension during pregnancy. Data Human Data A study using linked data from the Medical Birth Registry of Norway to the Norwegian Prescription Database compared pregnancy outcomes in women who redeemed prescriptions for triptans during pregnancy, as well as a migraine disease comparison group who redeemed prescriptions for triptans before pregnancy only. Of the 189 women who redeemed prescriptions for eletriptan during the first trimester, 4 (2.1%) had infants with major congenital malformations, while for the 174 women who redeemed prescriptions for eletriptan before, but not during, pregnancy, 11 (6.3%) had infants with major congenital malformations. Methodological limitations of this study, including small size of the eletriptan population and infrequent events, do not allow for thorough characterization of risk. Animal Data When pregnant rats were administered eletriptan (0, 10, 30, or 100 mg/kg/day) during the period of organogenesis, fetal weights were decreased and the incidences of vertebral and sternebral variations were increased at 100 mg/kg/day (approximately 12 times the maximum recommended human dose [MRHD] of 80 mg/day on a mg/m 2 basis). The 30 and 100 mg/kg/day doses were also maternally toxic, as evidenced by decreased maternal body weight gain during gestation. The no-effect dose for adverse effects on embryofetal development in rats was 30 mg/kg/day, which is approximately 4 times the MRHD on a mg/m 2 basis. When eletriptan (0, 5, 10, or 50 mg/kg/day) was orally administered to pregnant rabbits throughout organogenesis, fetal weights were decreased at 50 mg/kg/day. The incidences of fused sternebrae and vena cava deviations were increased at all doses. Maternal toxicity was not evident at any dose. A no-effect dose for adverse effects on embryofetal development in rabbits was not established; the lowest dose tested (5 mg/kg/day) is similar to the MRHD on a mg/m 2 basis. Oral administration of eletriptan (0, 5, 15, or 50 mg/kg/day) to female rats throughout pregnancy and lactation resulted in a decrease in offspring viability and body weight at the highest dose tested. The no-effect dose for adverse effects on pre- and postnatal development in rats (15 mg/kg/day) is approximately 2 times the MRHD on a mg/m 2 basis. 8.2 Lactation Risk Summary Eletriptan is excreted in human milk. There are no data on the effects of eletriptan on the breastfed infant or the effects of eletriptan on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for RELPAX and any potential adverse effects on the breastfed child from RELPAX or from the underlying maternal condition. Infant exposure can be minimized by avoiding breastfeeding for 24 hours after treatment. 8.4 Pediatric Use Safety and effectiveness in pediatric patients have not been established. The efficacy of RELPAX Tablets (40 mg) in patients 11–17 was not established in a randomized, placebo-controlled trial of 274 adolescent migraineurs [see Clinical Studies (14) ] . Adverse reactions observed were similar in nature to those reported in clinical trials in adults. Postmarketing experience with other triptans includes a limited number of reports that describe pediatric patients who have experienced clinically serious adverse reactions that are similar in nature to those reported rarely in adults. Long-term safety of eletriptan was studied in 76 adolescent patients who received treatment for up to one year. A similar profile of adverse reactions to that of adults was observed. The long-term safety of eletriptan in pediatric patients has not been established. 8.5 Geriatric Use Blood pressure was increased to a greater extent in elderly subjects than in young subjects. The pharmacokinetic disposition of eletriptan in the elderly is similar to that seen in younger adults [see Clinical Pharmacology (12.3) ] . In clinical trials, there were no apparent differences in efficacy or the incidence of adverse reactions between patients under 65 years of age and those 65 and above. 8.6 Hepatic Impairment The effect of severe hepatic impairment on RELPAX metabolism has not been evaluated. RELPAX is not recommended for use in patients with severe hepatic impairment [see Clinical Pharmacology (12.3) ] .

16 HOW SUPPLIED/STORAGE AND HANDLING RELPAX Tablets containing 20 mg or 40 mg eletriptan (base) as the hydrobromide salt. RELPAX Tablets are orange, round, convex shaped, film-coated tablets with appropriate debossing. They are supplied in the following strengths and package configurations: RELPAX Tablets Package Configuration Tablet Strength (mg) NDC Code Debossing Carton of 12 tablets. Two blisters of 6 tablets in each carton. 40 mg 0049-2340-05 REP40 and Pfizer Blister of 6 tablets 20 mg 0049-2330-45 REP20 and Pfizer Blister of 6 tablets 40 mg 0049-2340-45 REP40 and Pfizer Store at 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature].

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