LEVETIRACETAM

Levetiracetam tablets, USP is an antiepileptic drug available as 250 mg (blue), 500 mg (yellow) and 750 mg (pink) for oral administration. The chemical name of levetiracetam, a single enantiomer, is (-)-(S)-α-ethyl-2-oxo-1-pyrrolidine acetamide, its molecular formula is C 8 H 14 N 2 O 2 and its molecular weight is 170.21. Levetiracetam is chemically unrelated to existing antiepileptic drugs (AEDs). It has the following structural formula: Levetiracetam is a white to off-white crystalline powder with a faint odor and a bitter taste. It is very soluble in water (104.0 g/100 mL). It is freely soluble in chloroform (65.3 g/100 mL) and in methanol (53.6 g/100 mL), soluble in ethanol (16.5 g/100 mL), sparingly soluble in acetonitrile (5.7 g/100 mL) and practically insoluble in n-hexane. (Solubility limits are expressed as g/100 mL solvent.) Levetiracetam tablets contain the labeled amount of levetiracetam. Inactive ingredients: Corn starch, povidone, colloidal silicon dioxide, talc, magnesium stearate, and additional agents listed below: 250 mg tablets Opadry Blue (hydroxypropyl methylcellulose, polyethylene glycol 4000, titanium dioxide FD&C Blue #2 Indigo and Carmine Aluminum Lake) 500 mg tablets Opadry Yellow (hydroxypropyl methylcellulose polyethylene glycol 4000 titanium dioxide and Iron oxide Yellow) 750 mg tablets Opadry Pink (hydroxypropyl methylcellulose, polyethylene glycol 4000, titanium dioxide Iron oxide Red and Iron oxide Yellow Meets USP Dissolution Test 3 str

Levetiracetam tablets, USP are antiepileptic drug indicated for adjunctive therapy in the treatment of: Partial onset seizures in patients 4 years of age and older with epilepsy ( 1.1 ) Myoclonic seizures in patients 12 years of age and older with juvenile myoclonic epilepsy ( 1.2 ) Primary generalized tonic-clonic seizures in patients 6 years of age and older with idiopathic generalized epilepsy ( 1.3 ) 1.1 Partial Onset Seizures Levetiracetam tablets, USP are indicated as adjunctive therapy in the treatment of partial onset seizures in adults and children 4 years of age and older with epilepsy. Information describing the use of levetiracetam in pediatric patients less than 4 years of age as adjunctive therapy in the treatment of partial onset seizures is approved for UCB, Inc.’s levetiracetam tablets and oral solution. However, due to UCB Inc.’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. 1.2 Myoclonic Seizures in Patients with Juvenile Myoclonic Epilepsy Levetiracetam tablets, USP are indicated as adjunctive therapy in the treatment of myoclonic seizures in adults and adolescents 12 years of age and older with juvenile myoclonic epilepsy. 1.3 Primary Generalized Tonic-Clonic Seizures Levetiracetam tablets, USP are indicated as adjunctive therapy in the treatment of primary generalized tonic-clonic seizures in adults and children 6 years of age and older with idiopathic generalized epilepsy.

Use the oral solution for pediatric patients with body weight ≤ 20 kg ( 2.1 ). For pediatric patients, use weight-based dosing for the oral solution with a calibrated measuring device (not a household teaspoon or tablespoon) ( 2.1 ) Partial Onset Seizures 4 Years to < 16 Years: 10 mg/kg twice daily, increase in increments of 10 mg/kg twice daily every 2 weeks to recommended dose of 30 mg/kg twice daily ( 2.2 ) Adults 16 Years and Older: 500 mg twice daily, increase as needed and tolerated in increments of 500 mg twice daily every 2 weeks to a maximum recommended dose of 1500 mg twice daily ( 2.2 ) Myoclonic Seizures in Adults and Pediatric Patients 12 Years and Older 500 mg twice daily, increase by 500 mg twice daily every 2 weeks to recommended dose of 1500 mg twice daily ( 2.3 ) Primary Generalized Tonic-Clonic Seizures 6 Years to < 16 Years: 10 mg/kg twice daily, increase in increments of 10 mg/kg twice daily every 2 weeks to recommended dose of 30 mg/kg twice daily ( 2.4 ) Adults 16 Years and Older: 500 mg twice daily, increase by 500 mg twice daily every 2 weeks to recommended dose of 1500 mg twice daily ( 2.4 ) Adult Patients with Impaired Renal Function Dose adjustment is recommended, based on the patient’s estimated creatinine clearance ( 2.5 , 8.6 ) 2.1 Important Administration Instructions Levetiracetam tablets are given orally with or without food. The levetiracetam dosing regimen depends on the indication, age group, dosage form (tablets or oral solution) and renal function. Prescribe the oral solution for pediatric patients with body weight ≤ 20 kg. Prescribe the oral solution or tablets for pediatric patients with body weight above 20 kg. When using the oral solution in pediatric patients, dosing is weight-based (mg per kg) using a calibrated measuring device (not a household teaspoon or tablespoon). Levetiracetam tablets should be swallowed whole. Levetiracetam tablets should not be chewed or crushed. 2.2 Partial Onset Seizures Adults 16 Years and Older In clinical trials, daily doses of 1000 mg, 2000 mg, and 3000 mg, given as twice-daily dosing were shown to be effective. Although in some studies there was a tendency toward greater response with higher dose [see clinical studies (14.1) ], a consistent increase in response with increased dose has not been shown. Treatment should be initiated with a daily dose of 1000 mg/day, given as twice-daily dosing (500 mg twice daily). Additional dosing increments may be given (1000 mg/day additional every 2 weeks) to a maximum recommended daily dose of 3000 mg. Doses greater than 3000 mg/day have been used in open-label studies for periods of 6 months and longer. There is no evidence that doses greater than 3000 mg/day confer additional benefit. Pediatric Patients Dosing information in pediatric patients less than 4 years of age as adjunctive therapy in the treatment of partial onset seizures is approved for UCB, Inc.’s levetiracetam tablets and oral solution. However, due to UCB Inc.’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. 4 Years to < 16 Years Treatment should be initiated with a daily dose of 20 mg/kg in 2 divided doses (10 mg/kg twice daily). The daily dose should be increased every 2 weeks by increments of 20 mg/kg to the recommended daily dose of 60 mg/kg (30 mg/kg twice daily). If a patient cannot tolerate a daily dose of 60 mg/kg, the daily dose may be reduced. In the clinical efficacy trial, the mean daily dose was 44 mg/kg. The maximum daily dose was 3000 mg/day. For levetiracetam tablets dosing in pediatric patients weighing 20 to 40 kg, treatment should be initiated with a daily dose of 500 mg given as twice daily dosing (250 mg twice daily). The daily dose should be increased every 2 weeks by increments of 500 mg to a maximum recommended daily dose of 1500 mg (750 mg twice daily). For levetiracetam tablets dosing in pediatric patients weighing more than 40 kg, treatment should be initiated with a daily dose of 1000 mg/day given as twice daily dosing (500 mg twice daily). The daily dose should be increased every 2 weeks by increments of 1000 mg/day to a maximum recommended daily dose of 3000 mg (1500 mg twice daily). Levetiracetam Oral Solution Weight-Based Dosing Calculation For Pediatric Patients The following calculation should be used to determine the appropriate daily dose of oral solution for pediatric patients: Daily dose (mg/kg/day) × patient weight (kg) Total daily dose (mL/day) = --------------------------------------------------------- 100 mg/mL 2.3 Myoclonic Seizures in Patients 12 Years of Age and Older with Juvenile Myoclonic Epilepsy Treatment should be initiated with a dose of 1000 mg/day, given as twice-daily dosing (500 mg twice daily). Dosage should be increased by 1000 mg/day every 2 weeks to the recommended daily dose of 3000 mg. The effectiveness of doses lower than 3000 mg/day has not been studied. 2.4 Primary Generalized Tonic-Clonic Seizures Adults 16 Years and Older Treatment should be initiated with a dose of 1000 mg/day, given as twice-daily dosing (500 mg twice daily). Dosage should be increased by 1000 mg/day every 2 weeks to the recommended daily dose of 3000 mg. The effectiveness of doses lower than 3000 mg/day has not been adequately studied. Pediatric Patients Ages 6 to <16 Years Treatment should be initiated with a daily dose of 20 mg/kg in 2 divided doses (10 mg/kg twice daily). The daily dose should be increased every 2 weeks by increments of 20 mg/kg to the recommended daily dose of 60 mg/kg (30 mg/kg twice daily). The effectiveness of doses lower than 60 mg/kg/day has not been adequately studied. Patients with body weight ≤20 kg should be dosed with oral solution. Patients with body weight above 20 kg can be dosed with either tablets or oral solution [see Dosage and Administration (2.1) ]. Only whole tablets should be administered. 2.5 Adult Patients with Impaired Renal Function Levetiracetam tablets dosing must be individualized according to the patient’s renal function status. Recommended doses and adjustment for dose for adults are shown in Table 1. In order to calculate the dose recommended for patients with renal impairment, creatinine clearance adjusted for body surface area must be calculated. To do this an estimate of the patient’s creatinine clearance (CLcr) in mL/min must first be calculated using the following formula: [140 - age (years)] x weight (kg) CLcr= -------------------------------------------- × (0.85 for female patients) 72 x serum creatinine (mg/dL) Then CLcr is adjusted for body surface area (BSA) as follows: CLcr (mL/min) CLcr (mL/min/1.73m 2 ) = ---------------------------- x 1.73 BSA subject (m 2 ) Table 1: Dosing Adjustment Regimen For Adult Patients With Impaired Renal Function 1 Following dialysis, a 250 to 500 mg supplemental dose is recommended. Group Creatinine Clearance (mL/min/1.73m 2 ) Dosage Frequency Normal > 80 500 to 1,500 Every 12 hours Mild 50 – 80 500 to 1,000 Every 12 hours Moderate 30 – 50 250 to 750 Every 12 hours Severe <30 250 to 500 Every 12 hours ESRD patients using dialysis ---- 500 to 1,000 1 Every 24 hours 1

None ( 4 ) None.

Most common adverse reactions (incidence in levetiracetam tablets -treated patients is ≥ 5% more than in placebo-treated patients) include: Adult patients: somnolence, asthenia, infection and dizziness ( 6.1 ) Pediatric patients: fatigue, aggression, nasal congestion, decreased appetite, and irritability ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Exelan Pharmaceuticals, Inc. at 1-855-295-7455 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. The following adverse reactions are discussed in more details in other sections of labeling: Psychiatric Symptoms [ see Warnings and Precautions (5.1) ] Suicidal Behavior and Ideation [ see Warnings and Precautions (5.2) ] Somnolence and Fatigue [ see Warnings and Precautions (5.3) ] Serious Dermatological Reactions [ see Warnings and Precautions (5.4) ] Coordination Difficulties [ see Warnings and Precautions (5.5) ] Withdrawal Seizures [ see Warnings and Precautions (5.6) ] Hematologic Abnormalities [ see Warnings and Precautions (5.7) ] Blood Pressure Increases [see Warnings and Precautions (5.8) ] Seizure Control During Pregnancy [ see Warnings and Precautions (5.9) ] 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 prescriber should be aware that the adverse reaction incidence figures in the following tables, obtained when levetiracetam tablets was added to concurrent AED therapy, cannot be used to predict the frequency of adverse reactions in the course of usual medical practice where patient characteristics and other factors may differ from those prevailing during clinical trials. Similarly, the cited frequencies cannot be directly compared with figures obtained from other clinical investigations involving different treatments, uses, or investigators. An inspection of these frequencies, however, does provide the prescriber with one basis to estimate the relative contribution of drug and non-drug factors to the adverse reaction incidences in the population studied. Partial Onset Seizures Adults In controlled clinical studies in adults with partial onset seizures, the most frequently reported adverse reactions in patients receiving levetiracetam tablets in combination with other AEDs, for events with rates greater than placebo, were somnolence, asthenia, infection and dizziness. Of the most frequently reported adverse reactions in adults experiencing partial onset seizures, asthenia, somnolence and dizziness appeared to occur predominantly during the first 4 weeks of treatment with levetiracetam tablets. Table 3 lists adverse reactions that occurred in at least 1% of adult epilepsy patients treated with levetiracetam tablets participating in placebo-controlled studies and were numerically more common than in patients treated with placebo. In these studies, either levetiracetam tablets or placebo was added to concurrent AED therapy. Adverse reactions were usually mild to moderate in intensity. Table 3: Incidence (%) Of Adverse Reactions In Placebo-Controlled, Add-On Studies In Adults Experiencing Partial Onset Seizures By Body System (Adverse Reactions Occurred In At Least 1% Of levetiracetam tablets -Treated Patients And Occurred More Frequently Than Placebo-Treated Patients) Body System / Adverse Reaction Levetiracetam ( N = 769 ) % Placebo ( N = 439 ) % Body as a Whole Asthenia 15 9 Headache 14 13 Infection 13 8 Pain 7 6 Digestive System Anorexia 3 2 Nervous System Somnolence 15 8 Dizziness 9 4 Depression 4 2 Nervousness 4 2 Ataxia 3 1 Vertigo 3 1 Amnesia 2 1 Anxiety 2 1 Hostility 2 1 Paresthesia 2 1 Emotional Lability 2 0 Respiratory System Pharyngitis 6 4 Rhinitis 4 3 Cough Increased 2 1 Sinusitis 2 1 Special Senses Diplopia 2 1 In controlled adult clinical studies, 15% of patients receiving levetiracetam tablets and 12% receiving placebo either discontinued or had a dose reduction as a result of an adverse reaction. Table 4 lists the most common (>1%) adverse reactions that resulted in discontinuation or dose reduction and that occurred more frequently in levetiracetam tablets -treated patients than in placebo-treated patients Table 4: Adverse Reactions That Most Commonly Resulted In Discontinuation Or Dose Reduction That Occurred More Frequently In levetiracetam -Treated Patients In Placebo-Controlled Studies In Adult Patients Experiencing Partial Onset Seizures Adverse Reaction Levetiracetam ( N = 769 ) % Placebo ( N = 439 ) % Dizziness 1 0 Somnolence 4 2 Pediatric Patients 4 Years to <16 Years The adverse reaction data presented below was obtained from a pooled analysis of two controlled pediatric clinical studies in children 4 to 16 years of age with partial onset seizures. The adverse reactions most frequently reported with the use of levetiracetam tablets in combination with other AEDs, for events with rates greater than placebo, were fatigue, aggression, nasal congestion, decreased appetite, and irritability. Table 5 lists adverse reactions from the pooled pediatric controlled studies (4 to 16 years of age) that occurred in at least 2% of pediatric levetiracetam tablets -treated patients and were numerically more common than in pediatric patients treated with placebo. In these studies, either levetiracetam tablets or placebo was added to concurrent AED therapy. Adverse reactions were usually mild to moderate in intensity. Table 5: Incidence (%) Of Adverse Reactions In Pooled Placebo-Controlled, Add-On Studies In Pediatric Patients Ages 4 to 16 Years Experiencing Partial Onset Seizures By Body System (Adverse Reactions Occurred In At Least 2% Of levetiracetam -Treated Patients And Occurred More Frequently Than Placebo-Treated Patients) Body System / Adverse Reaction Levetiracetam ( N = 165 ) % Placebo ( N = 131 ) % Ear and Labyrinth Disorders Ear Pain 2 1 Eye Disorders Conjunctivitis 2 0 Gastrointestinal Disorders Vomiting 15 12 Abdominal Pain Upper 9 8 Diarrhea 6 5 Constipation 3 1 General Disorders and Administration Site Conditions Fatigue 11 5 Infections and Infestations Nasopharyngitis 15 12 Influenza 3 1 Gastroenteritis 2 0 Rhinitis 2 0 Injury , Poisoning and Procedural Complications Head Injury 4 0 Contusion 3 1 Fall 3 2 Joint Sprain 2 1 Metabolism and Nutrition Disorders Decreased Appetite 8 2 Anorexia 4 3 Musculoskeletal and Connective Tissue Disorders Arthralgia 2 0 Neck Pain 2 1 Nervous System Headache 19 15 Somnolence 13 9 Dizziness 7 5 Lethargy 6 2 Sedation 2 1 Psychiatric Disorders Aggression 10 5 Abnormal Behavior 7 4 Irritability 7 1 Insomnia 5 3 Agitation 4 1 Depression 3 1 Mood Altered 3 1 Affect Lability 2 1 Anxiety 2 1 Confusional State 2 0 Mood Swings 2 1 Respiratory , Thoracic and Mediastinal Disorders Cough 9 5 Nasal Congestion 9 2 Pharyngolaryngeal Pain 7 4 In the well-controlled pooled pediatric clinical studies in patients 4 to16 years of age, 7% of patients receiving levetiracetam tablets and 9% receiving placebo discontinued as a result of an adverse event. Adverse reaction information in pediatric patients less than 4 years of age as adjunctive therapy in the treatment of partial onset seizures is approved for UCB, Inc.’s levetiracetam tablets and oral solution. However, due to UCB Inc.’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. Myoclonic Seizures Although the pattern of adverse reactions in this study seems somewhat different from that seen in patients with partial seizures, this is likely due to the much smaller number of patients in this study compared to partial seizure studies. The adverse reaction pattern for patients with JME is expected to be essentially the same as for patients with partial seizures. In the well-controlled clinical study that included both adolescent (12 to 16 years of age) and adult patients with myoclonic seizures, the most frequently reported adverse reactions in patients using levetiracetam tablets in combination with other AEDs, for events with rates greater than placebo, were somnolence, neck pain, and pharyngitis. Table 7 lists adverse reactions that occurred in at least 5% of juvenile myoclonic epilepsy patients experiencing myoclonic seizures treated with levetiracetam tablets and were numerically more common than in patients treated with placebo. In this study, either levetiracetam tablets or placebo was added to concurrent AED therapy. Adverse reactions were usually mild to moderate in intensity. Table 7: Incidence (%) Of Adverse Reactions In A Placebo-Controlled, Add-On Study In Patients 12 Years Of Age And Older With Myoclonic Seizures By Body System (Adverse Reactions Occurred In At Least 5% Of levetiracetam -Treated Patients And Occurred More Frequently Than Placebo-Treated Patients) Body System / Adverse Reaction Levetiracetam ( N = 60 ) % Placebo ( N = 60 ) % Ear and labyrinth disorders Vertigo 5 3 Infections and infestations Pharyngitis 7 0 Influenza 5 2 Musculoskeletal and connective tissue disorders Neck pain 8 2 Nervous system disorders Somnolence 12 2 Psychiatric disorders Depression 5 2 In the placebo-controlled study, 8% of patients receiving levetiracetam tablets and 2% receiving placebo either discontinued or had a dose reduction as a result of an adverse reaction. The adverse reactions that led to discontinuation or dose reduction and that occurred more frequently in levetiracetam tablets -treated patients than in placebo-treated patients are presented in Table 8. Table 8:Adverse Reactions That Resulted In Discontinuation Or Dose Reduction That Occurred More Frequently in levetiracetam -Treated Patients In The Placebo-Controlled Study In Patients With Juvenile Myoclonic Epilepsy Adverse Reaction Levetiracetam ( N = 60 ) % Placebo ( N = 60 ) % Anxiety 3 2 Depressed mood 2 0 Depression 2 0 Diplopia 2 0 Hypersomnia 2 0 Insomnia 2 0 Irritability 2 0 Nervousness 2 0 Somnolence 2 0 Primary Generalized Tonic-Clonic Seizures Although the pattern of adverse reactions in this study seems somewhat different from that seen in patients with partial seizures, this is likely due to the much smaller number of patients in this study compared to partial seizure studies. The adverse reaction pattern for patients with PGTC seizures is expected to be essentially the same as for patients with partial seizures. In the controlled clinical study that included patients 4 years of age and older with primary generalized tonic-clonic (PGTC) seizures, the most frequently reported adverse reaction in patients using levetiracetam tablets in combination with other AEDs, for events with rates greater than placebo, was nasopharyngitis. Table 9 lists adverse reactions that occurred in at least 5% of idiopathic generalized epilepsy patients experiencing PGTC seizures treated with levetiracetam tablets and were numerically more common than in patients treated with placebo. In this study, either levetiracetam tablets or placebo was added to concurrent AED therapy. Adverse reactions were usually mild to moderate in intensity. Table 9: Incidence (%) Of Adverse Reactions In A Placebo-Controlled, Add-On Study In Patients 4 Years Of Age And Older With PGTC Seizures By MedDRA System Organ Class (Adverse Reactions Occurred In At Least 5% Of levetiracetam -Treated Patients And Occurred More Frequently Than Placebo-Treated Patients) Body System / Adverse Reaction Levetiracetam ( N = 79 ) % Placebo ( N = 84 ) % Gastrointestinal disorders Diarrhea 8 7 General disorders and administration site conditions Fatigue 10 8 Infections and infestations Nasopharyngitis 14 5 Psychiatric disorders Irritability 6 2 Mood Swings 5 1 In the placebo-controlled study, 5% of patients receiving levetiracetam tablets and 8% receiving placebo either discontinued or had a dose reduction during the treatment period as a result of an adverse reaction. This study was too small to adequately characterize the adverse reactions that could be expected to result in discontinuation of treatment in this population. It is expected that the adverse reactions that would lead to discontinuation in this population would be similar to those resulting in discontinuation in other epilepsy trials (see tables 4 and 8). In addition, the following adverse reactions were seen in other well-controlled adult studies of levetiracetam tablets: balance disorder, disturbance in attention, eczema, memory impairment, myalgia, and vision blurred. Comparison of Gender, Age and Race The overall adverse reaction profile of levetiracetam tablets was similar between females and males. There are insufficient data to support a statement regarding the distribution of adverse experience reports by age and race. 6.2 Postmarketing Experience The following adverse reactions have been identified during postapproval use of levetiracetam tablets. 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. In addition to the adverse reactions listed above, [ see Adverse Reactions (6.1) ], the following adverse events have been reported in patients receiving marketed levetiracetam tablets worldwide. The listing is alphabetized: abnormal liver function test, choreoathetosis, dyskinesia, erythema multiforme, hepatic failure, hepatitis, hyponatremia leukopenia, muscle weakness, neutropenia, pancreatitis, pancytopenia (with bone marrow suppression identified in some of these cases), panic attack, thrombocytopenia, and weight loss. Alopecia has been reported with levetiracetam tablets use; recovery was observed in majority of cases where levetiracetam tablets was discontinued.

No significant pharmacokinetic interactions were observed between levetiracetam or its major metabolite and concomitant medications via human liver cytochrome P450 isoforms, epoxide hydrolase, UDP-glucuronidation enzymes, P-glycoprotein, or renal tubular secretion [see Clinical Pharmacology (12.3) ].