ONGENTYS

6 ADVERSE REACTIONS The following clinically significant adverse reactions are discussed in more detail in other sections of the labeling: Cardiovascular Effects with Concomitant Use of Drugs Metabolized by Catechol-O-Methyltransferase (COMT) [see Warnings and Precautions ( 5.1 )] Falling Asleep During Activities of Daily Living and Somnolence [see Warnings and Precautions ( 5.2 )] Hypotension/Syncope [see Warnings and Precautions ( 5.3 )] Dyskinesia [see Warnings and Precautions ( 5.4 )] Hallucinations and Psychosis [see Warnings and Precautions ( 5.5 )] Impulse Control/Compulsive Disorders [see Warnings and Precautions ( 5.6 )] Withdrawal-Emergent Hyperpyrexia and Confusion [see Warnings and Precautions ( 5.7 )] Most common adverse reactions (≥4% and > placebo): dyskinesia, constipation, blood creatine kinase increased, hypotension/syncope, and weight decreased. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Neurocrine Biosciences, Inc. at 877-641-3461 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 practice. The safety of ONGENTYS was evaluated in 265 patients with Parkinson’s disease (PD) in two 14-15 week placebo- and active-controlled (Study 1) or placebo-controlled (Study 2) studies [see Clinical Studies ( 14 )] . All patients were taking a stable dose of levodopa and a DOPA decarboxylase inhibitor, alone or in combination with other PD medications. In Study 1 and Study 2, the mean age of patients was 63.6 years, 59% of patients were male, and 89% of patients were Caucasian. At baseline, the mean duration of PD was 7.6 years. Adverse Reactions Leading to Discontinuation of Treatment In Study 1 and Study 2, a total of 8% of ONGENTYS 50 mg-treated patients and 6% of patients who received placebo discontinued due to adverse events. The most common adverse reaction leading to discontinuation was dyskinesia, reported in 3% of ONGENTYS 50 mg-treated patients and 0.4% of patients who received placebo. Common Adverse Reactions Adverse reactions that occurred in the pooled studies at an incidence of at least 2% and greater than placebo are presented in Table 1. The most common adverse reactions (incidence at least 4% and greater than placebo) were dyskinesia, constipation, blood creatine kinase increased, hypotension/syncope, and weight decreased. Table 1 : Adverse Reactions with an Incidence of at Least 2 % in Patients Treated with ONGENTYS and Greater than on Placebo, in Pooled Study 1 and Study 2 Adverse Reactions ONGENTYS 50 mg N=265 % Placebo N=257 % Nervous system disorders Dyskinesia Dizziness 20 3 6 1 Gastrointestinal disorders Constipation Dry mouth 6 3 2 1 Psychiatric disorders Hallucination 1 Insomnia 3 3 1 2 Investigations Blood creatine kinase increased Weight decreased 5 4 2 0 Vascular disorders Hypotension/syncope 2 Hypertension 5 3 1 2 1 Includes hallucinations, hallucinations visual, hallucinations auditory, and hallucinations mixed 2 Includes hypotension, orthostatic hypotension, syncope, and presyncope

4 CONTRAINDICATIONS ONGENTYS is contraindicated in patients with: Concomitant use of non-selective monoamine oxidase (MAO) inhibitors [ see Drug Interactions ( 7.1 ) ] . Pheochromocytoma, paraganglioma, or other catecholamine secreting neoplasms. Concomitant use of non-selective monoamine oxidase (MAO) inhibitors. ( 4 ) History of pheochromocytoma, paraganglioma, or other catecholamine secreting neoplasms. ( 4 )

11 DESCRIPTION ONGENTYS contains opicapone, a peripheral, selective and reversible catechol-O-methyltransferase (COMT) inhibitor. The chemical name of opicapone is 2,5-dichloro-3-(5-(3,4-dihydroxy-5-nitrophenyl)-1,2,4-oxadiazol-3-yl)-4,6-dimethylpyridine-1-oxide with the following structure: The opicapone molecular formula is C15H10Cl2N4O6; and its molecular weight is 413.17. Opicapone is a yellow powder/crystalline solid with limited aqueous solubility. ONGENTYS capsules are intended for oral administration. Each capsule contains 25 mg or 50 mg of opicapone. ONGENTYS also contains the following inactive ingredients: lactose, magnesium stearate, pregelatinized starch, and sodium starch glycolate. The capsule shells contain: FD&C Blue#2, FD&C Red#3, gelatin, and titanium dioxide. ONGENTYS contains opicapone, a peripheral, selective and reversible catechol-O-methyltransferase (COMT) inhibitor. The chemical name of opicapone is 2,5-dichloro-3-(5-(3,4-dihydroxy-5-nitrophenyl)-1,2,4-oxadiazol-3-yl)-4,6-dimethylpyridine-1-oxide with the following structure:

2 DOSAGE AND ADMINISTRATION The recommended dosage is 50 mg administered orally once daily at bedtime. ( 2.1 ) Patients should not eat food for 1 hour before and for at least 1 hour after intake of ONGENTYS. ( 2.1 ) The recommended dosage in patients with moderate hepatic impairment is 25 mg orally once daily at bedtime; avoid use in patients with severe hepatic impairment. ( 2.2 ) 2.1 Dosing and Administration Information The recommended dosage of ONGENTYS is 50 mg administered orally once daily at bedtime. Patients should not eat food for 1 hour before and for at least 1 hour after intake of ONGENTYS [see Clinical Pharmacology ( 12.3 )]. 2.2 Dosage Recommendations for Patients with Hepatic Impairment In patients with moderate hepatic impairment (Child-Pugh B), the recommended dose of ONGENTYS is 25 mg orally once daily at bedtime [see Use in Specific Populations ( 8.7 ), Clinical Pharmacology ( 12.3 )]. Avoid use of ONGENTYS in patients with severe (Child-Pugh C) hepatic impairment [ see Use in Specific Populations ( 8.7 ) , Clinical Pharmacology ( 12.3 ) ]. 2.3 D iscontinuation and Missed Dose When discontinuing ONGENTYS, monitor patients and consider adjustment of other dopaminergic therapies as needed. If a dose of ONGENTYS is missed, the next dose should be taken at the scheduled time the next day.

1 INDICATIONS AND USAGE ONGENTYS is indicated as adjunctive treatment to levodopa/carbidopa in patients with Parkinson’s disease (PD) experiencing “off” episodes. ONGENTYS is a catechol-O-methyltransferase (COMT) inhibitor indicated as adjunctive treatment to levodopa/carbidopa in patients with Parkinson’s disease (PD) experiencing “off” episodes. ( 1 )

10 OVERDOSAGE No specific antidotes for ONGENTYS are known. As a general measure, removal of ONGENTYS by gastric lavage and/or inactivation by administering activated charcoal should be considered. In managing overdose, provide supportive care, including close medical supervision and monitoring, and consider the possibility of multiple drug involvement. If an over-exposure occurs, call your poison control center at 1-800-222-1222 or www.poison.org.

7 DRUG INTERACTIONS 7.1 Non-Selective Monoamine Oxidase (MAO) Inhibitors Both ONGENTYS and non-selective MAO inhibitors (e.g., phenelzine, isocarboxazid, and tranylcypromine) inhibit catecholamine metabolism, leading to increased levels of catecholamines. Concomitant use may increase the risk of possible arrhythmias, increased heart rate, and excessive changes in blood pressure. Concomitant use of ONGENTYS with non-selective MAO inhibitors is contraindicated [see Contraindications ( 4 )] . Selective MAO-B inhibitors can be used concomitantly with ONGENTYS. 7.2 Effect of ONGENTYS on Other Drugs Drugs Metabolized by Catechol-O-Methyltransferase (COMT) Concomitant use of ONGENTYS with drugs metabolized by COMT may affect the pharmacokinetics of those drugs, which may increase the risk of possible arrhythmias, increased heart rate, and excessive changes in blood pressure [see Warnings and Precautions ( 5.1 )] . Drugs known to be metabolized by COMT should be administered with caution. Monitor for changes in heart rate, rhythm, and blood pressure in patients concomitantly treated with ONGENTYS and drugs metabolized by COMT [see Warnings and Precautions ( 5.1 )] .

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Opicapone is a selective and reversible inhibitor of catechol-O-methyltransferase (COMT). COMT catalyzes the transfer of the methyl group of S-adenosyl-L-methionine to the phenolic group of substrates that contain a catechol structure. Physiological substrates of COMT include DOPA, catecholamines (dopamine, norepinephrine, and epinephrine), and their hydroxylated metabolites. When decarboxylation of levodopa is prevented by carbidopa, COMT becomes the major metabolizing enzyme for levodopa, catalyzing its metabolism to 3-methoxy-4-hydroxy-L-phenylalanine (3-OMD). 12.2 Pharmacodynamics COMT Activity Once-daily administration of ONGENTYS 50 mg caused inhibition of COMT activity in erythrocytes; the maximal inhibition seen was 84% and was maintained >65% over a 24-hour dosing interval in patients with Parkinson’s disease. Following termination of treatment, COMT inhibition slowly returns to baseline levels, with >35% inhibition still observed 5 days after the last dose. Effects on Levodopa Peak (C max ) and overall levodopa exposure (AUC) increased by 43-44% and 62-94%, respectively, in PD patients following once-daily administration of ONGENTYS at bedtime with levodopa/carbidopa administered every three or every four hours, as compared to after administration of levodopa/carbidopa alone. C ardiac Electrophysiology At a dose 16 times the recommended dosage, ONGENTYS does not prolong the QT interval to any clinically relevant extent. 12.3 Pharmacokinetics Opicapone demonstrates dose-proportional pharmacokinetics over a 25 mg (0.5 times the recommended dosage) to 50 mg dose range. The pharmacokinetics of opicapone are similar in both PD patients and healthy subjects. Absorption After single-dose administration of ONGENTYS 50 mg, the median (range) plasma T max value was 2.0 (1.0-4.0) hours. Effect of Food Following a moderate fat/moderate calorie meal, the mean peak plasma concentration (C max ) for opicapone decreased 62%, the mean overall plasma exposure (AUC) decreased 31%, and the T max was delayed by 4 hours. In Study 1, ONGENTYS was administered without regard to food. In Study 2, ONGENTYS administration and food consumption were separated by 1 hour [see Dosage and Administration ( 2.1 ), Clinical Studies ( 14 )]. Distribution Opicapone is highly bound to plasma proteins (>99%), which is independent of concentration. Elimination The mean elimination half-life of opicapone is 1 to 2 hours. Metabolism Sulphation is the primary metabolic pathway of opicapone, based on clinical studies and in vitro assessments. Other metabolic pathways include glucuronidation, methylation (by COMT), reduction, and glutathione conjugation. Excretion After administration of a single dose of radiolabeled opicapone 100 mg (2 times the recommended dosage) to healthy subjects, approximately 70% of the dose was recovered in feces (22% as unchanged), 20% in expired air, and 5% in urine (<1% as unchanged). Specific Populations No clinically significant differences in the pharmacokinetics of opicapone were observed based on age (i.e., 18 to 40 years of age and ≥ 65 years of age), sex, or race/ethnicity (i.e., Japanese, Caucasian, Asian, and Black). Renal Impairment Based on population pharmacokinetic analyses, no clinically significant differences in the pharmacokinetics of opicapone were observed in patients with mild or moderate renal impairment (CLcr 30-89 mL/min using the Cockcroft-Gault equation) relative to those with normal renal function (CLcr >90 mL/min). Patients with severe renal impairment or ESRD (CLcr <30 mL/min) have not been studied [see Use in Specific Populations ( 8.6 )] . Hepatic Impairment The single-dose pharmacokinetics of opicapone was evaluated in subjects with mild (Child-Pugh: A) and moderate (Child-Pugh: B) hepatic impairment. In subjects with mild hepatic impairment, the mean overall opicapone plasma exposure (AUC) increased by 35%, which is not expected to be clinically significant. In subjects with moderate hepatic impairment, the mean overall opicapone plasma exposure (AUC) increased by 84%. Dosage adjustment for ONGENTYS is required in subjects with moderate hepatic impairment [see Dosage and Administration ( 2.2 )] . ONGENTYS has not been studied in patients with severe hepatic impairment (Child-Pugh: C) [see Use in Speci fic Populations ( 8.7 )]. Drug Interaction Studies Clinical Studies No clinically significant differences in the pharmacokinetics of opicapone were observed when administered concomitantly with quinidine (index substrate of P-gp [MDR1]), acetaminophen, or rasagiline. No clinically significant differences in the pharmacokinetics of the following drugs were observed when administered concomitantly with opicapone: S-warfarin (index substrate of CYP2C9), R-Warfarin (substrate of CYP1A2 and CYP3A4), or repaglinide (index substrate of CYP2C8 and OATP1B1). No clinically significant differences in the pharmacokinetics of the following drugs for the treatment of Parkinson’s disease were observed when administered concomitantly with opicapone: rasagiline, selegiline, pramipexole, ropinirole, or amantadine. In Vitro Studies Opicapone does not affect protein binding of warfarin, diazepam, digoxin, or tolbutamide, in vitro. CYP Enzymes : Opicapone is not an inhibitor or inducer of major CYPs. Transporter Systems : Opicapone is a substrate of P-gp (MDR1) (see Clinical Studies), BCRP, MRP2, OATP1B3, and OATP2B1. No clinically significant transporter mediated interaction is expected for opicapone. Opicapone is not an inhibitor of P-gp (MDR1), BCRP, OAT1, OAT3, OCT1, OCT2, OATP1B3, BSEP, MATE1, or MATE2-K.

12.1 Mechanism of Action Opicapone is a selective and reversible inhibitor of catechol-O-methyltransferase (COMT). COMT catalyzes the transfer of the methyl group of S-adenosyl-L-methionine to the phenolic group of substrates that contain a catechol structure. Physiological substrates of COMT include DOPA, catecholamines (dopamine, norepinephrine, and epinephrine), and their hydroxylated metabolites. When decarboxylation of levodopa is prevented by carbidopa, COMT becomes the major metabolizing enzyme for levodopa, catalyzing its metabolism to 3-methoxy-4-hydroxy-L-phenylalanine (3-OMD).

12.2 Pharmacodynamics COMT Activity Once-daily administration of ONGENTYS 50 mg caused inhibition of COMT activity in erythrocytes; the maximal inhibition seen was 84% and was maintained >65% over a 24-hour dosing interval in patients with Parkinson’s disease. Following termination of treatment, COMT inhibition slowly returns to baseline levels, with >35% inhibition still observed 5 days after the last dose. Effects on Levodopa Peak (C max ) and overall levodopa exposure (AUC) increased by 43-44% and 62-94%, respectively, in PD patients following once-daily administration of ONGENTYS at bedtime with levodopa/carbidopa administered every three or every four hours, as compared to after administration of levodopa/carbidopa alone. C ardiac Electrophysiology At a dose 16 times the recommended dosage, ONGENTYS does not prolong the QT interval to any clinically relevant extent.

12.3 Pharmacokinetics Opicapone demonstrates dose-proportional pharmacokinetics over a 25 mg (0.5 times the recommended dosage) to 50 mg dose range. The pharmacokinetics of opicapone are similar in both PD patients and healthy subjects. Absorption After single-dose administration of ONGENTYS 50 mg, the median (range) plasma T max value was 2.0 (1.0-4.0) hours. Effect of Food Following a moderate fat/moderate calorie meal, the mean peak plasma concentration (C max ) for opicapone decreased 62%, the mean overall plasma exposure (AUC) decreased 31%, and the T max was delayed by 4 hours. In Study 1, ONGENTYS was administered without regard to food. In Study 2, ONGENTYS administration and food consumption were separated by 1 hour [see Dosage and Administration ( 2.1 ), Clinical Studies ( 14 )]. Distribution Opicapone is highly bound to plasma proteins (>99%), which is independent of concentration. Elimination The mean elimination half-life of opicapone is 1 to 2 hours. Metabolism Sulphation is the primary metabolic pathway of opicapone, based on clinical studies and in vitro assessments. Other metabolic pathways include glucuronidation, methylation (by COMT), reduction, and glutathione conjugation. Excretion After administration of a single dose of radiolabeled opicapone 100 mg (2 times the recommended dosage) to healthy subjects, approximately 70% of the dose was recovered in feces (22% as unchanged), 20% in expired air, and 5% in urine (<1% as unchanged). Specific Populations No clinically significant differences in the pharmacokinetics of opicapone were observed based on age (i.e., 18 to 40 years of age and ≥ 65 years of age), sex, or race/ethnicity (i.e., Japanese, Caucasian, Asian, and Black). Renal Impairment Based on population pharmacokinetic analyses, no clinically significant differences in the pharmacokinetics of opicapone were observed in patients with mild or moderate renal impairment (CLcr 30-89 mL/min using the Cockcroft-Gault equation) relative to those with normal renal function (CLcr >90 mL/min). Patients with severe renal impairment or ESRD (CLcr <30 mL/min) have not been studied [see Use in Specific Populations ( 8.6 )] . Hepatic Impairment The single-dose pharmacokinetics of opicapone was evaluated in subjects with mild (Child-Pugh: A) and moderate (Child-Pugh: B) hepatic impairment. In subjects with mild hepatic impairment, the mean overall opicapone plasma exposure (AUC) increased by 35%, which is not expected to be clinically significant. In subjects with moderate hepatic impairment, the mean overall opicapone plasma exposure (AUC) increased by 84%. Dosage adjustment for ONGENTYS is required in subjects with moderate hepatic impairment [see Dosage and Administration ( 2.2 )] . ONGENTYS has not been studied in patients with severe hepatic impairment (Child-Pugh: C) [see Use in Speci fic Populations ( 8.7 )]. Drug Interaction Studies Clinical Studies No clinically significant differences in the pharmacokinetics of opicapone were observed when administered concomitantly with quinidine (index substrate of P-gp [MDR1]), acetaminophen, or rasagiline. No clinically significant differences in the pharmacokinetics of the following drugs were observed when administered concomitantly with opicapone: S-warfarin (index substrate of CYP2C9), R-Warfarin (substrate of CYP1A2 and CYP3A4), or repaglinide (index substrate of CYP2C8 and OATP1B1). No clinically significant differences in the pharmacokinetics of the following drugs for the treatment of Parkinson’s disease were observed when administered concomitantly with opicapone: rasagiline, selegiline, pramipexole, ropinirole, or amantadine. In Vitro Studies Opicapone does not affect protein binding of warfarin, diazepam, digoxin, or tolbutamide, in vitro. CYP Enzymes : Opicapone is not an inhibitor or inducer of major CYPs. Transporter Systems : Opicapone is a substrate of P-gp (MDR1) (see Clinical Studies), BCRP, MRP2, OATP1B3, and OATP2B1. No clinically significant transporter mediated interaction is expected for opicapone. Opicapone is not an inhibitor of P-gp (MDR1), BCRP, OAT1, OAT3, OCT1, OCT2, OATP1B3, BSEP, MATE1, or MATE2-K.

20200424

4

3 DOSAGE FORMS AND STRENGTHS ONGENTYS capsules are available in the following strengths: 50 mg capsules with a dark blue opaque cap and dark pink opaque body; axially printed with “OPC” over “50” in white ink, on both the cap and body. 25 mg capsules with a light blue opaque cap and light pink opaque body; axially printed with “OPC” over “25” in blue ink, on both the cap and body. Capsules: 25 mg and 50 mg. ( 3 )

ONGENTYS opicapone OPICAPONE OPICAPONE STARCH, CORN LACTOSE, UNSPECIFIED FORM SODIUM STARCH GLYCOLATE TYPE A POTATO MAGNESIUM STEARATE GELATIN TITANIUM DIOXIDE FD&C RED NO. 3 FD&C BLUE NO. 2 light blue opaque cap and light pink opaque body OPC;25 Capsule ONGENTYS opicapone OPICAPONE OPICAPONE STARCH, CORN LACTOSE, UNSPECIFIED FORM SODIUM STARCH GLYCOLATE TYPE A POTATO MAGNESIUM STEARATE GELATIN TITANIUM DIOXIDE FD&C RED NO. 3 FD&C BLUE NO. 2 dark blue opaque cap and dark pink opaque body OPC;50 Capsule

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis No increase in tumors was observed when opicapone was administered orally to mice (0, 100, 375, or 750 mg/kg/day) for up to 2 years (84-93 weeks at the high dose). The highest dose tested is approximately 70 times the recommended dose (RHD) in humans (50 mg/day) on a body surface area (mg/m 2 ) basis. No increase in tumors was observed when opicapone was administered orally to rats (0, 100, 500, or 1000 mg/kg/day) for 2 years. Plasma exposure (AUC) at the highest dose tested is approximately 24 times that in humans at the RHD (50 mg/day). Mutagenesis Opicapone was negative in in vitro (bacterial reverse mutation test (Ames), chromosomal aberrations in human peripheral blood lymphocytes) and in in vivo (rat bone marrow micronucleus) assays. Impairment of Fertility In male and female rats, oral administration of opicapone (0, 100, 500, or 1000 mg/kg/day) prior to and during mating and continuing in females to gestation day 6, resulted in no adverse effects on fertility or general reproductive performance. Plasma exposure (AUC) at the highest dose tested is approximately 40 times that in humans at the RHD.

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis No increase in tumors was observed when opicapone was administered orally to mice (0, 100, 375, or 750 mg/kg/day) for up to 2 years (84-93 weeks at the high dose). The highest dose tested is approximately 70 times the recommended dose (RHD) in humans (50 mg/day) on a body surface area (mg/m 2 ) basis. No increase in tumors was observed when opicapone was administered orally to rats (0, 100, 500, or 1000 mg/kg/day) for 2 years. Plasma exposure (AUC) at the highest dose tested is approximately 24 times that in humans at the RHD (50 mg/day). Mutagenesis Opicapone was negative in in vitro (bacterial reverse mutation test (Ames), chromosomal aberrations in human peripheral blood lymphocytes) and in in vivo (rat bone marrow micronucleus) assays. Impairment of Fertility In male and female rats, oral administration of opicapone (0, 100, 500, or 1000 mg/kg/day) prior to and during mating and continuing in females to gestation day 6, resulted in no adverse effects on fertility or general reproductive performance. Plasma exposure (AUC) at the highest dose tested is approximately 40 times that in humans at the RHD.

NDA212489

ONGENTYS

opicapone

70370-3050

HUMAN PRESCRIPTION DRUG

ORAL

PRINCIPAL DISPLAY PANEL NDC 70370-3025-2 Ongentys ® (opicapone) capsules 25 mg 30 Capsules Rx only PRINCIPAL DISPLAY PANEL NDC 70370-3025-2 Ongentys® (opicapone) capsules 25 mg 30 Capsules Rx only

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling ( Patient Information ). Administration Instruct patients and/or caregivers that ONGENTYS capsules should be taken at bedtime. Inform patients to not eat food for 1 hour before and for at least 1 hour after intake of ONGENTYS [see Dosage and Administration ( 2.1 )] . Concomitant Medications Certain medications can cause an interaction with ONGENTYS. Advise patients and/or caregivers to inform their healthcare provider of all the medicines the patient is taking, including over-the-counter medicines, dietary supplements, and herbal products [see Warnings and Precautions ( 5.1 ) and Drug Interactions ( 7 )] . Falling Asleep During Activities of Daily Living Advise patients and/or caregivers that somnolence has been reported with ONGENTYS. Patients treated with dopaminergic medications have reported falling asleep while engaged in activities of daily living. These adverse reactions may affect some patients’ ability to drive and operate machinery safely [see Warnings and Precautions ( 5.2 )] . Hypotension/Syncope Advise patients that ONGENTYS may cause hypotension or syncope [see Warnings and Precautions ( 5.3 )]. Dyskinesia Advise patients that ONGENTYS may cause dyskinesia or exacerbate pre-existing dyskinesia [see Warnings and Precautions ( 5.4 )]. Hallucinations and Psychosis Advise patients that ONGENTYS may cause hallucinations, delusions, or aggressive behavior and they should report any of these adverse reactions to their healthcare provider [see Warnings and Precautions ( 5.5 )]. Impulse Control /Compulsive Disorders Inform patients of the potential for experiencing intense urges to gamble, increased sexual urges, intense urges to spend money, binge eating, and other intense urges and the inability to control these urges while taking ONGENTYS and one or more medications that increase central dopaminergic tone that are generally used for the treatment of PD. Advise patients that they should report any of these adverse reactions to their healthcare provider [see Warnings and Precautions ( 5.6 )] . Withdrawal-Emergent Hyperpyrexia and Confusion Advise patients to contact their healthcare provider before stopping ONGENTYS. Tell patients to inform their healthcare provider if they develop symptoms such as fever, confusion, or severe muscle stiffness after stopping ONGENTYS [see Warnings and Precautions ( 5.7 )] . For further information on ONGENTYS, call 1-833-ONGENTYS (833-664-3689) or visit www.ongentys.com Distributed by: Neurocrine Biosciences, Inc., San Diego, CA 92130 Under license from BIAL-Portela & C a , S.A. ONGENTYS is a registered trademark of BIAL-Portela & C a , S.A. 91067001

14 CLINICAL STUDIES The efficacy of ONGENTYS for the adjunctive treatment to levodopa/carbidopa in patients with Parkinson’s disease (PD) experiencing “off” episodes was evaluated in two double-blind, randomized, parallel-group, placebo- and active-controlled (Study 1, NCT01568073), or placebo-controlled (Study 2, NCT01227655) studies of 14-15 week duration. All patients were treated with levodopa/ DOPA decarboxylase inhibitor (DDCI) (alone or in combination with other PD medications). The double-blind period for each study began with a period for levodopa/DDCI dose adjustment (up to 3 weeks), followed by a stable maintenance period of 12 weeks. Study 1 In Study 1, patients (n=600) were randomized to treatment with one of 3 doses of ONGENTYS. The intention to treat (ITT) population included patients treated with ONGENTYS 50 mg once daily (n=115) or placebo (n=120). Baseline demographic characteristics were similar across all treatment groups: approximately 60% of patients were male, mean age was 64 years, and all patients were Caucasian. Baseline PD characteristics in the treatment groups were: mean duration of PD of 7 years for ONGENTYS 50 mg compared to 7.7 years for placebo, and mean onset of motor fluctuations of 2.2 years prior to study enrollment. Eighty-two percent of patients in both groups used concomitant PD medications in addition to levodopa; the most commonly used were dopamine agonists (68%), amantadine (23%), MAO-B inhibitors (20%), and anticholinergics (5%). The primary efficacy endpoint was the change in mean absolute OFF-time based on 24-hour patient diaries completed 3 days prior to each of the scheduled visits. ONGENTYS 50 mg significantly reduced mean absolute OFF-time compared to placebo (Table 2). Table 2 : Study 1 - Absolute OFF-time ( Hours ) Change from Baseline to Endpoint N Baseline Mean ( S E ) LS Mean Change from Baseline (SE) Placebo-subtracted Difference (95% CI) Adjusted p-value a Placebo 120 6.17 hours (0.162) -0.93 (0.223) -- -- ONGENTYS 50 mg 115 6.20 hours (0.166) -1.95 (0.233) -1.01 (-1.620, -0.407) p=0.002 CI=confidence interval; LS =least squares; N=total number of patients; SE=standard error. a Adjusted p values were calculated using a gatekeeping procedure controlling for multiplicity. ON-time without troublesome dyskinesia was a secondary efficacy endpoint in Study 1 (Table 3). Table 3: Study 1 - Absolute ON-time Without Troublesome Dyskinesia (Hours) Change from Baseline to Endpoint N Baseline Mean (SE) LS Mean Change from Baseline (SE) Placebo-subtracted Difference (95% CI) Nominal p-value a Placebo 120 9.61 (0.191) 0.75 (0.237) -- -- ONGENTYS 50 mg 115 9.54 (0.183) 1.84 (0.247) 1.08 (0.440, 1.728) p=0.001 CI=confidence interval; LS =least squares; N=total number of patients; SE=standard error. a Unadjusted p-value. Study 2 In Study 2, patients (n=427) were randomized to treatment with either one of two doses of ONGENTYS once daily (n=283) or placebo (n=144). The intention to treat (ITT) study population included patients treated with ONGENTYS 50 mg once daily (n=147) or placebo (n=135). Baseline demographic characteristics (ONGENTYS 50 mg vs. placebo) were: mean age (66 years vs. 62 years), male (61% vs. 53%), Caucasian (78% vs. 66%) and Asian (21% vs. 31%). Baseline PD characteristics were generally similar across treatment groups with a mean duration of PD of 8.2 years, and a mean onset of motor fluctuations of 3.2 years prior to study enrollment. Eighty-five percent of patients treated with ONGENTYS 50 mg compared to 81% of patients who received placebo used concomitant PD medications in addition to levodopa; the most commonly used were dopamine agonists (70%), amantadine (21%), MAO-B inhibitors (20%), and anticholinergics (12%). The primary efficacy endpoint was the change in mean absolute OFF-time based on 24-hour patient diaries completed 3 days prior to each of the scheduled visits. ONGENTYS 50 mg significantly reduced mean absolute OFF-time compared to placebo (Table 4). Table 4 : Study 2 - Absolute OFF-time ( Hours ) Change from Baseline to Endpoint N Baseline Mean (S E ) LS Mean Change from Baseline (SE) Placebo-subtracted Difference (95% CI) Adjusted p-value a Placebo 135 6.12 (0.200) -1.07 (0.239) -- -- ONGENTYS 50 mg 147 6.32 (0.183) -1.98 (0.230) -0.91 (-1.523, -0.287) p=0.008 CI=confidence interval; LS =least squares; N=total number of patients; SE=standard error. a Adjusted p values were calculated using Dunnett's alpha level adjustment to control for multiplicity. ON-time without troublesome dyskinesia was a secondary efficacy endpoint in Study 2 (Table 5). Table 5: Study 2 - Absolute ON-time without troublesome dyskinesia (Hours) Change from Baseline to Endpoint N Baseline Mean (SE) LS Mean Change from Baseline (SE) Placebo-subtracted Difference (95% CI) Nominal p-value Placebo 135 9.61 (0.206) 0.80 (0.256) -- -- ONGENTYS 50 mg 147 9.37 (0.183) 1.43 (0.247) 0.62 (-0.039, 1.287) p=0.065 (NS * ) CI=confidence interval; LS =least squares; N=total number of patients; SE=standard error. *= not statistically significant.

8.5 Geriatric Use No dose adjustment is required for elderly patients. Of the total number of patients who received ONGENTYS 50 mg in Study 1 and Study 2, 52% of patients were 65 years and older. No overall differences in safety and effectiveness were observed between these patients and younger patients, but greater sensitivity to adverse reactions of some older individuals cannot be ruled out.

8.4 Pediatric Use Safety and effectiveness in pediatric patients have not been established.

8.1 Pregnancy Risk Summary There are no adequate data on the developmental risk associated with use of ONGENTYS in pregnant women. In animal studies, oral administration of opicapone during pregnancy resulted in adverse effects on embryofetal development (increased incidence of fetal abnormalities) at clinically relevant plasma exposures in one of two species tested. In addition, opicapone is always given concomitantly with levodopa/carbidopa, which is known to cause developmental toxicity in rabbits ( s ee Data ). The background risk of major birth defects and miscarriage in the U.S. general population is 2-4% and 15-20% of clinically recognized pregnancies, respectively. The background risk for major birth defects and miscarriage in patients with Parkinson’s disease is unknown. Data Animal Data Oral administration of opicapone (0, 150, 375, or 1000 mg/kg/day) to pregnant rats throughout gestation resulted in no adverse effects on embryofetal development. Plasma exposure (AUC) at the highest dose tested (1000 mg/kg/day) was approximately 40 times that in humans at the recommended human dose (50 mg/day). In pregnant rabbits, oral administration of opicapone (0, 100, 175, or 225 mg/kg/day) during the period of organogenesis resulted in increased incidence of structural abnormalities at all doses tested; maternal toxicity was observed at all but the lowest dose tested. A no-effect dose for adverse effects on embryofetal development was not identified. Plasma exposure (AUC) at the low-effect dose (100 mg/kg/day) was less than that in humans at the RHD. Oral administration of opicapone (0, 150, 375, or 1000 mg/kg/day) throughout gestation and lactation resulted in no adverse effects on pre- and postnatal development; however, effects on neurobehavioral development in the offspring were not rigorously assessed. Plasma exposure (AUC) at the highest dose tested (1000 mg/kg/day) was approximately 40 times that in humans at the RHD. Opicapone is always given concomitantly with levodopa/carbidopa, which is known to cause visceral and skeletal malformations in rabbits. The developmental toxicity of opicapone in combination with levodopa/carbidopa was not assessed in animals.

8 USE IN SPECIFIC POPULATIONS Pregnancy: Based on animal data, may cause fetal harm ( 8.1 ) Avoid use in patients with end-stage renal disease. ( 8.6 ) 8.1 Pregnancy Risk Summary There are no adequate data on the developmental risk associated with use of ONGENTYS in pregnant women. In animal studies, oral administration of opicapone during pregnancy resulted in adverse effects on embryofetal development (increased incidence of fetal abnormalities) at clinically relevant plasma exposures in one of two species tested. In addition, opicapone is always given concomitantly with levodopa/carbidopa, which is known to cause developmental toxicity in rabbits ( s ee Data ). The background risk of major birth defects and miscarriage in the U.S. general population is 2-4% and 15-20% of clinically recognized pregnancies, respectively. The background risk for major birth defects and miscarriage in patients with Parkinson’s disease is unknown. Data Animal Data Oral administration of opicapone (0, 150, 375, or 1000 mg/kg/day) to pregnant rats throughout gestation resulted in no adverse effects on embryofetal development. Plasma exposure (AUC) at the highest dose tested (1000 mg/kg/day) was approximately 40 times that in humans at the recommended human dose (50 mg/day). In pregnant rabbits, oral administration of opicapone (0, 100, 175, or 225 mg/kg/day) during the period of organogenesis resulted in increased incidence of structural abnormalities at all doses tested; maternal toxicity was observed at all but the lowest dose tested. A no-effect dose for adverse effects on embryofetal development was not identified. Plasma exposure (AUC) at the low-effect dose (100 mg/kg/day) was less than that in humans at the RHD. Oral administration of opicapone (0, 150, 375, or 1000 mg/kg/day) throughout gestation and lactation resulted in no adverse effects on pre- and postnatal development; however, effects on neurobehavioral development in the offspring were not rigorously assessed. Plasma exposure (AUC) at the highest dose tested (1000 mg/kg/day) was approximately 40 times that in humans at the RHD. Opicapone is always given concomitantly with levodopa/carbidopa, which is known to cause visceral and skeletal malformations in rabbits. The developmental toxicity of opicapone in combination with levodopa/carbidopa was not assessed in animals. 8.2 Lactation Risk Summary There are no data on the presence of opicapone in human milk, the effects on the breastfed infant, or the effects on milk production. In lactating rats, oral administration of opicapone resulted in levels of opicapone or metabolites in milk similar to those in maternal plasma . The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for ONGENTYS and any potential adverse effects on the breastfed infant from ONGENTYS or from the underlying maternal condition. 8.4 Pediatric Use Safety and effectiveness in pediatric patients have not been established. 8.5 Geriatric Use No dose adjustment is required for elderly patients. Of the total number of patients who received ONGENTYS 50 mg in Study 1 and Study 2, 52% of patients were 65 years and older. No overall differences in safety and effectiveness were observed between these patients and younger patients, but greater sensitivity to adverse reactions of some older individuals cannot be ruled out. 8.6 Renal Impairment The renal route of elimination plays a minor role in the clearance of opicapone [see Clinical Pharmacology ( 12.3 )]. Avoid use of ONGENTYS in patients with end-stage renal disease (ESRD) (CLcr <15 mL/min). No dosage adjustment is required for patients with mild, moderate, or severe renal impairment. However, because of a potential for increased exposure, monitor patients with severe renal impairment for adverse reactions and discontinue ONGENTYS if tolerability issues arise. 8. 7 Hepatic Impairment Opicapone exposure is increased in patients with hepatic impairment [see Clinical Pharmacology ( 12.3 )] . Avoid use of ONGENTYS in patients with severe (Child-Pugh C) hepatic impairment. Dosage adjustment is recommended for patients with moderate (Child-Pugh B) hepatic impairment [see Dosage and Administration ( 2.2 )] . No dosage adjustment is required in patients with mild (Child-Pugh A) hepatic impairment.

16 HOW SUPPLIED/STORAGE AND HANDLING 16.1 How Supplied ONGENTYS (opicapone) capsules are available as: • 50 mg hard gelatin capsules, Size 1; dark blue opaque cap and dark pink opaque body; axially printed with “OPC” over “50” in white ink, on both the cap and body - Bottle of 30 with child-resistant closure: NDC 70370-3050-2 • 25 mg hard gelatin capsules, Size 1; light blue opaque cap and light pink opaque body; axially printed with “OPC” over “25” in blue ink, on both the cap and body - Bottle of 30 with child-resistant closure: NDC 70370-3025-2 16.2 Storage and Handling Store at a temperature below 30°C (86°F).

16.2 Storage and Handling Store at a temperature below 30°C (86°F).