LACOSAMIDE

RECENT MAJOR CHANGES Dosage and Administration (2.1) 4/2023 Dosage and Administration (2.2) 10/2023

1 INDICATIONS AND USAGE Lacosamide injection is indicated for: Treatment of partial-onset seizures in patients 4 years of age and older (1.1) Adjunctive therapy in the treatment of primary generalized tonic-clonic seizures in patients 4 years of age and older (1.2) 1.1 Partial-Onset Seizures Lacosamide injection is indicated for the treatment of partial-onset seizures in patients 4 years of age and older. Pediatric use information is approved for UCB, Inc.'s VIMPAT® (lacosamide) injection. However, due to UCB, Inc.'s marketing exclusivity rights, this drug product is not labeled with that information. 1.2 Primary Generalized Tonic-Clonic Seizures Lacosamide is indicated as adjunctive therapy in the treatment of primary generalized tonic-clonic seizures in patients 4 years of age and older.

2 DOSAGE AND ADMINISTRATION Adults (17 years and older): Initial dosage for monotherapy for the treatment of partial-onset seizures is 100 mg twice daily (2.1) Initial dosage for adjunctive therapy for the treatment of partial-onset seizures or primary generalized tonic-clonic seizures is 50 mg twice daily (2.1) Maximum recommended dosage for monotherapy and adjunctive therapy is 200 mg twice daily (2.1) Pediatric Patients 4 years to less than 17 years : The recommended dosage is based on body weight and is administered orally twice daily (2.1) Increase dosage based on clinical response and tolerability, no more frequently than once per week (2.1) Injection: for intravenous use only when oral administration is temporarily not feasible; the recommended dosage is based on body weight and is administered two or three times daily over 15 to 60 minutes; obtaining ECG before initiation is recommended in certain patients (2.7, 5.3) Dose adjustment is recommended for severe renal impairment (2.4, 12.3) Dose adjustment is recommended for mild or moderate hepatic impairment; use in patients with severe hepatic impairment is not recommended (2.5, 12.3) 2.1 Dosage Information The recommended dosage for monotherapy and adjunctive therapy for partial-onset seizures in patients 4 years of age and older and for adjunctive therapy for primary generalized tonic-clonic seizures in patients 4 years of age and older is included in Table 1. In pediatric patients 4 years to less than 17 years of age, the recommended dosing regimen is dependent upon body weight. Dosage should be increased based on clinical response and tolerability, no more frequently than once per week. Titration increments should not exceed those shown in Table 1. Table 1: Recommended Dosages for Partial-Onset Seizures (Monotherapy or Adjunctive Therapy) in Patients 4 years of age and Older, and for Primary Generalized Tonic-Clonic Seizures (Adjunctive Therapy) in Patients 4 Years of Age and Older* Age and Body Weight Initial Dosage Titration Regimen Maintenance Dosage Adults (17 years and older) Monotherapy**: 100 mg twice daily (200 mg per day) Increase by 50 mg twice daily (100 mg per day) every week Monotherapy**: 150 mg to 200 mg twice daily (300 mg to 400 mg per day) Adjunctive Therapy: 50 mg twice daily (100 mg per day) Adjunctive Therapy: 100 mg to 200 mg twice daily (200 mg to 400 mg per day) Pediatric patients weighing at least 50 kg 50 mg twice daily (100 mg per day) Increase by 50 mg twice daily (100 mg per day) every week Monotherapy**: 150 mg to 200 mg twice daily (300 mg to 400 mg per day) Adjunctive Therapy: 100 mg to 200 mg twice daily (200 mg to 400 mg per day) Pediatric patients weighing 30 kg to less than 50 kg 1 mg/kg twice daily (2 mg/kg/day) Increase by 1 mg/kg twice daily (2 mg/kg/day) every week 2 mg/kg to 4 mg/kg twice daily (4 mg/kg/day to 8 mg/kg/day) Pediatric patients weighing 11 kg to less than 30 kg 1 mg/kg twice daily (2 mg/kg/day) Increase by 1 mg/kg twice daily (2 mg/kg/day) every week 3 mg/kg to 6 mg/kg twice daily (6 mg/kg/day to 12 mg/kg/day) *when not specified, the dosage is the same for monotherapy for partial-onset seizures and adjunctive therapy for partial-onset seizures or primary generalized tonic-clonic seizures. Oral and intravenous dosages are the same unless specified. **Monotherapy for partial-onset seizures only In adjunctive clinical trials in adult patients with partial-onset seizures, a dosage higher than 200 mg twice daily (400 mg per day) was not more effective and was associated with a substantially higher rate of adverse reactions [see Adverse Reactions (6.1) and Clinical Studies (14.2)] . Lacosamide Injection Dosage L acosamide injection may be used when oral administration is temporarily not feasible [see Dosage and Administration (2.6) and Warnings and Precautions (5.3)]. L acosamide injection can be administered intravenously to adult and pediatric patients weighing 11 kg or more with the same dosing regimens described …

2.7 Discontinuation of Lacosamide When discontinuing lacosamide injection, a gradual withdrawal over at least 1 week is recommended [see Warnings and Precautions (5.5) ] .

3 DOSAGE FORMS AND STRENGTHS Lacosamide Injection, USP 200 mg/20 mL: clear, colorless sterile solution in single-dose vials 200 mg/20 mL single-dose vial for intravenous use ( 3 )

4 CONTRAINDICATIONS None. None ( 4 )

6 ADVERSE REACTIONS The following serious adverse reactions are described below and elsewhere in the labeling: • Suicidal Behavior and Ideation [see Warnings and Precautions (5.1) ] • Dizziness and Ataxia [ see Warnings and Precautions (5.2) ] • Cardiac Rhythm and Conduction Abnormalities [ see Warnings and Precautions (5.3) ] • Syncope [ see Warnings and Precautions (5.4) ] • Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)/Multiorgan Hypersensitivity Reactions [ see Warnings and Precautions (5.6) ] • Adjunctive therapy: Most common adverse reactions in adults (≥10% and greater than placebo) are diplopia, headache, dizziness, nausea, and somnolence (6.1) • Monotherapy: Most common adverse reactions are similar to those seen in adjunctive therapy studies (6.1) • Pediatric patients: Adverse reactions are similar to those seen in adult patients (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Glenmark Pharmaceuticals Inc., USA at 1 (888) 721-7115 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. Laboratory Abnormalities Abnormalities in liver function tests have occurred in controlled trials with lacosamide in adult patients with partial-onset seizures who were taking 1 to 3 concomitant anti-epileptic drugs. Elevations of ALT to ≥3x ULN occurred in 0.7% (7/935) of lacosamide patients and 0% (0/356) of placebo patients. One case of hepatitis with transaminases >20x ULN occurred in one healthy subject 10 days after lacosamide treatment completion, along with nephritis (proteinuria and urine casts). Serologic studies were negative for viral hepatitis. Transaminases returned to normal within one month without specific treatment. At the time of this event, bilirubin was normal. The hepatitis/nephritis was interpreted as a delayed hypersensitivity reaction to lacosamide. Other Adverse Reactions The following is a list of adverse reactions reported by patients treated with lacosamide in all clinical trials in adult patients, including controlled trials and long-term open-label extension trials. Adverse reactions addressed in other tables or sections are not listed here. Blood and lymphatic system disorders: neutropenia, anemia Cardiac disorders: palpitations Ear and labyrinth disorders: tinnitus Gastrointestinal disorders: constipation, dyspepsia, dry mouth, oral hypoaesthesia General disorders and administration site conditions: irritability, pyrexia, feeling drunk Injury, poisoning, and procedural complications: fall Musculoskeletal and connective tissue disorders: muscle spasms Nervous system disorders: paresthesia, cognitive disorder, hypoaesthesia, dysarthria, disturbance in attention, cerebellar syndrome Psychiatric disorders: confusional state, mood altered, depressed mood Lacosamide Injection Adult Patients (17 Years and Older) Adverse reactions with intravenous administration to adult patients with partial-onset seizures generally were similar to those that occurred with the oral formulation, although intravenous administration was associated with local adverse reactions such as injection site pain or discomfort (2.5%), irritation (1%), and erythema (0.5%). One case of profound bradycardia (26 bpm: BP 100/60 mmHg) occurred in a patient during a 15- minute infusion of 150 mg lacosamide. This patient was on a beta-blocker. Infusion was discontinued and the patient experienced a rapid recovery. The safety of a 15-minute loading dose administration of lacosamide injection 200 mg to 400 mg followed by oral administration of lacosamide given twice daily at the same total daily dose as the initial intravenous infusion was assessed in an open-label study in adult patients with partial-onset seizures. Patients had to have been ma …

7 DRUG INTERACTIONS 7.1 Strong CYP3A4 or CYP2C9 Inhibitors Patients with renal or hepatic impairment who are taking strong inhibitors of CYP3A4 and CYP2C9 may have a significant increase in exposure to lacosamide. Dose reduction may be necessary in these patients. 7.2 Concomitant Medications that Affect Cardiac Conduction Lacosamide should be used with caution in patients on concomitant medications that affect cardiac conduction (sodium channel blockers, beta-blockers, calcium channel blockers, potassium channel blockers) including those that prolong PR interval (including sodium channel blocking AEDs), because of a risk of AV block, bradycardia, or ventricular tachyarrhythmia. In such patients, obtaining an ECG before beginning lacosamide, and after lacosamide is titrated to steady-state, is recommended. In addition, these patients should be closely monitored if they are administered lacosamide through the intravenous route [see Warnings and Precautions (5.3) ] .

8 USE IN SPECIFIC POPULATIONS Pregnancy: Based on animal data, may cause fetal harm ( 8.1 ) Pediatric use information is approved for UCB, Inc.’s VIMPAT ® (lacosamide) injection. However, due to UCB, Inc.’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. 8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to antiepileptic drugs (AEDs), such as lacosamide, during pregnancy. Encourage women who are taking lacosamide during pregnancy to enroll in the North American Antiepileptic Drug (NAAED) pregnancy registry by calling 1-888-233-2334 or visiting http://www.aedpregnancyregistry.org/. Risk Summary Available data from the North American Antiepileptic Drug (NAAED) pregnancy registry, a prospective cohort study, case reports, and a case series with lacosamide use in pregnant women are insufficient to identify a drug-associated risk of major birth defects, miscarriage or other adverse maternal or fetal outcomes. Lacosamide produced developmental toxicity (increased embryofetal and perinatal mortality, growth deficit) in rats following administration during pregnancy. Developmental neurotoxicity was observed in rats following administration during a period of postnatal development corresponding to the third trimester of human pregnancy. These effects were observed at doses associated with clinically relevant plasma exposures ( see Data ) . The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively. Data Animal Data Oral administration of lacosamide to pregnant rats (20, 75, or 200 mg/kg/day) and rabbits (6.25, 12.5, or 25 mg/kg/day) during the period of organogenesis did not produce any effects on the incidences of fetal structural abnormalities. However, the maximum doses evaluated were limited by maternal toxicity in both species and embryofetal death in rats. These doses were associated with maternal plasma lacosamide exposures (AUC) approximately 2 and 1 times (rat and rabbit, respectively) that in humans at the maximum recommended human dose (MRHD) of 400 mg/day. In two studies in which lacosamide (25, 70, or 200 mg/kg/day and 50, 100, or 200 mg/kg/day) was orally administered to rats throughout pregnancy and lactation, increased perinatal mortality and decreased body weights in the offspring were observed at the highest dose tested. The no-effect dose for pre- and postnatal developmental toxicity in rats (70 mg/kg/day) was associated with a maternal plasma lacosamide AUC similar to that in humans at the MRHD. Oral administration of lacosamide (30, 90, or 180 mg/kg/day) to rats during the neonatal and juvenile periods of development resulted in decreased brain weights and long-term neurobehavioral changes (altered open field performance, deficits in learning and memory). The early postnatal period in rats is generally thought to correspond to late pregnancy in humans in terms of brain development. The no-effect dose for developmental neurotoxicity in rats was associated with a plasma lacosamide AUC less than that in humans at the MRHD. In Vitro Data Lacosamide has been shown in vitro to interfere with the activity of collapsin response mediator protein-2 (CRMP-2), a protein involved in neuronal differentiation and control of axonal outgrowth. Potential adverse effects on CNS development related to this activity cannot be ruled out. 8.2 Lactation Risk Summary Data from published literature indicate that lacosamide is present in human milk. There are reports of increased sleepiness in breastfed infants exposed to lacosamide (see Clinical Considerations ) . There is no information on the effects of lacosamid …

12.1 Mechanism of Action The precise mechanism by which lacosamide exerts its antiepileptic effects in humans remains to be fully elucidated. In vitro electrophysiological studies have shown that lacosamide selectively enhances slow inactivation of voltage-gated sodium channels, resulting in stabilization of hyperexcitable neuronal membranes and inhibition of repetitive neuronal firing.

16.1 How Supplied Lacosamide Injection, USP 200 mg/20 mL is a clear, colorless sterile solution supplied in 20 mL colorless single-dose glass vials. 200 mg/20 mL vial in cartons of 10 vials NDC 69543-455-10

16.2 Storage and Handling 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] Do not freeze lacosamide injection. Discard unused portion.

11 DESCRIPTION The chemical name of lacosamide, USP the single (R)-enantiomer, is (R)-2-acetamido-Nbenzyl- 3-methoxypropionamide (IUPAC). Lacosamide, USP is a functionalized amino acid. Its molecular formula is C 13 H 18 N 2 O 3 and its molecular weight is 250.30. The chemical structure is: Lacosamide, USP is a white to light yellow powder. It is sparingly soluble in water and slightly soluble in acetonitrile and ethanol. "Image Description" 11.2 Lacosamide Injection, USP Lacosamide injection, USP is a clear, colorless, sterile solution containing 10 mg lacosamide per mL for intravenous infusion. One 20-mL vial contains 200 mg of lacosamide drug substance. The inactive ingredients are sodium chloride (7.62 mg/mL) and water for injection. Hydrochloric acid is used for pH adjustment. Lacosamide injection, USP has a pH of 3.8 to 5.0.

10 OVERDOSAGE Events reported after an intake of more than 800 mg (twice the maximum recommended daily dosage) of lacosamide include dizziness, nausea, and seizures (generalized tonic-clonic seizures, status epilepticus). Cardiac conduction disorders, confusion, decreased level of consciousness, cardiogenic shock, cardiac arrest, and coma have also been observed. Fatalities have occurred following lacosamide overdoses of several grams. There is no specific antidote for overdose with lacosamide. Standard decontamination procedures should be followed. General supportive care of the patient is indicated including monitoring of vital signs and observation of the clinical status of patient. A Certified Poison Control Center should be contacted for up to date information on the management of overdose with lacosamide. Standard hemodialysis procedures result in significant clearance of lacosamide (reduction of systemic exposure by 50% in 4 hours). Hemodialysis may be indicated based on the patient's clinical state or in patients with significant renal impairment.

16 HOW SUPPLIED/STORAGE AND HANDLING 16.1 How Supplied Lacosamide Injection, USP Lacosamide injection, USP is a clear, colorless solution supplied as below: NDC Number Concentration Volume Package 70069- 471 -10 200 mg/20 mL (10 mg/mL) 20 mL Single Dose Vial Pack of 10 Single Dose Vials 16.2 Storage and Handling 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] Do not freeze lacosamide injection. Discard unused portion.