Lacosamide - Lacosamide tablet, Film Coated
(Lacosamide)Lacosamide - Lacosamide tablet, Film Coated Prescribing Information
Dosage and Administration (
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, 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.
| Age and Body Weight | Initial Dosage | Titration Regimen | Maintenance Dosage |
| Adults (17 years and older) | Monotherapy **:100 mg twice daily (200 mg per day) Adjunctive Therapy :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 at least 50 kg | 50 mg twice daily (100 mg per day) | I ncrease 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) |
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
Age and Body Weight | Alternate Initial Dosage | Titration Regimen | Maintenance Dosage |
Adults (17 years and older) | Single loading dose: 200 mg 12 hours later initiate: 100 mg twice daily (200 mg per day) | Increase by 50 mg twice daily (100 mg per day) at weekly intervals, if needed | 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) |
Lacosamide tablets are indicated for:
• Treatment of partial-onset seizures in patients 4 years of age and older (
Lacosamide tablets are indicated for the treatment of partial-onset seizures in patients 4 years of age and older.
• Adjunctive therapy in the treatment of primary generalized tonic-clonic seizures in patients 4 years of age and older (
Lacosamide tablets are indicated as adjunctive therapy in the treatment of primary generalized tonic-clonic seizures in patients 4 years of age and older.
•
o Initial dosage for monotherapy for the treatment of partial-onset seizures is 100 mg twice daily (
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, 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.
| Age and Body Weight | Initial Dosage | Titration Regimen | Maintenance Dosage |
| Adults (17 years and older) | Monotherapy **:100 mg twice daily (200 mg per day) Adjunctive Therapy :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 at least 50 kg | 50 mg twice daily (100 mg per day) | I ncrease 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) |
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
o Initial dosage for adjunctive therapy for the treatment of partial-onset seizures or primary generalized tonic-clonic seizures is 50 mg twice daily (
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, 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.
| Age and Body Weight | Initial Dosage | Titration Regimen | Maintenance Dosage |
| Adults (17 years and older) | Monotherapy **:100 mg twice daily (200 mg per day) Adjunctive Therapy :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 at least 50 kg | 50 mg twice daily (100 mg per day) | I ncrease 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) |
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
o Maximum recommended dosage for monotherapy and adjunctive therapy is 200 mg twice daily (
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, 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.
| Age and Body Weight | Initial Dosage | Titration Regimen | Maintenance Dosage |
| Adults (17 years and older) | Monotherapy **:100 mg twice daily (200 mg per day) Adjunctive Therapy :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 at least 50 kg | 50 mg twice daily (100 mg per day) | I ncrease 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) |
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
•
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, 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.
| Age and Body Weight | Initial Dosage | Titration Regimen | Maintenance Dosage |
| Adults (17 years and older) | Monotherapy **:100 mg twice daily (200 mg per day) Adjunctive Therapy :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 at least 50 kg | 50 mg twice daily (100 mg per day) | I ncrease 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) |
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
• Increase dosage based on clinical response and tolerability, no more frequently than once per week (
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, 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.
| Age and Body Weight | Initial Dosage | Titration Regimen | Maintenance Dosage |
| Adults (17 years and older) | Monotherapy **:100 mg twice daily (200 mg per day) Adjunctive Therapy :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 at least 50 kg | 50 mg twice daily (100 mg per day) | I ncrease 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) |
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
• Dose adjustment is recommended for severe renal impairment (
For patients with mild to moderate renal impairment, no dosage adjustment is necessary.
For patients with severe renal impairment [creatinine clearance (CLCR) less than 30 mL/min as estimated by the Cockcroft-Gault equation for adults; CLCRless than 30 mL/min/1.73m2as estimated by the Schwartz equation for pediatric patients] or end-stage renal disease, a reduction of 25% of the maximum dosage is recommended.
In all patients with renal impairment, dose initiation and titration should be based on clinical response and tolerability.
Lacosamide tablets are effectively removed from plasma by hemodialysis. Following a 4-hour hemodialysis treatment, dosage supplementation of up to 50% should be considered.
Dose reduction may be necessary in patients with renal impairment who are taking strong inhibitors of CYP3A4 and CYP2C9
The pharmacokinetics of lacosamide have been studied in healthy adult subjects (age range 18 to 87), adults with partial-onset seizures, adults with diabetic neuropathy, and subjects with renal and hepatic impairment. The pharmacokinetics of lacosamide are similar in healthy subjects, patients with partial-onset seizures, and patients with primary generalized tonic-clonic seizures.
Lacosamide is completely absorbed after oral administration with negligible first-pass effect with a high absolute bioavailability of approximately 100%. The maximum lacosamide plasma concentrations occur approximately 1-to-4-hour post-dose after oral dosing, and elimination half-life is approximately 13 hours. Steady state plasma concentrations are achieved after 3 days of twice daily repeated administration. Pharmacokinetics of lacosamide are dose proportional (100-800 mg) and time invariant, with low inter- and intra-subject variability. Compared to lacosamide the major metabolite, O-desmethyl metabolite, has a longer Tmax(0.5 to 12 hours) and elimination half-life (15-23 hours).
Lacosamide is completely absorbed after oral administration. The oral bioavailability of lacosamide tablets is approximately 100%. Food does not affect the rate and extent of absorption.
After intravenous administration, Cmaxis reached at the end of infusion. The 30- and 60-minute intravenous infusions are bioequivalent to the oral tablet. For the 15-minute intravenous infusion, bioequivalence was met for AUC(0-tz)but not for Cmax. The point estimate of Cmaxwas 20% higher than Cmaxfor oral tablet and the 90% CI for Cmaxexceeded the upper boundary of the bioequivalence range.
In a trial comparing the oral tablet with an oral solution containing 10 mg/mL lacosamide, bioequivalence between both formulations was shown.
A single loading dose of 200 mg approximates steady-state concentrations comparable to the 100 mg twice daily oral administration.
The volume of distribution is approximately 0.6 L/kg and thus close to the volume of total body water. Lacosamide is less than 15% bound to plasma proteins.
Lacosamide is primarily eliminated from the systemic circulation by renal excretion and biotransformation.
After oral administration of 100 mg [14C]-lacosamide approximately 95% of radioactivity administered was recovered in the urine and less than 0.5% in the feces. The major compounds excreted were unchanged lacosamide (approximately 40% of the dose), its O-desmethyl metabolite (approximately 30%), and a structurally unknown polar fraction (~20%). The plasma exposure of the major human metabolite, O-desmethyl-lacosamide, is approximately 10% of that of lacosamide. This metabolite has no known pharmacological activity.
The CYP isoforms mainly responsible for the formation of the major metabolite (O-desmethyl) are CYP3A4, CYP2C9, and CYP2C19. The elimination half-life of the unchanged drug is approximately 13 hours and is not altered by different doses, multiple dosing or intravenous administration.
There is no enantiomeric interconversion of lacosamide.
Lacosamide and its major metabolite are eliminated from the systemic circulation primarily by renal excretion.
The AUC of lacosamide was increased approximately 25% in mildly (CLCR50-80 mL/min) and moderately (CLCR30-50 mL/min) and 60% in severely (CLCR≤30 mL/min) renally impaired patients compared to subjects with normal renal function (CLCR>80 mL/min), whereas Cmaxwas unaffected. Lacosamide is effectively removed from plasma by hemodialysis. Following a 4-hour hemodialysis treatment, AUC of lacosamide is reduced by approximately 50%
Lacosamide undergoes metabolism. Subjects with moderate hepatic impairment (Child-Pugh B) showed higher plasma concentrations of lacosamide (approximately 50-60% higher AUC compared to healthy subjects). The pharmacokinetics of lacosamide have not been evaluated in severe hepatic impairment
The pediatric pharmacokinetic profile of lacosamide was determined in a population pharmacokinetic analysis using sparse plasma concentration data obtained in two open-label studies in 79 pediatric patients with partial -onset seizures that included patient 4 years to less than 17 years age.
A weight based dosing regimen is necessary to achieve lacosamide exposures in pediatric patients 4 years to less than 17 years of age similar to those observed in adults treated at effective doses of lacosamide
The pharmacokinetics of lacosamide in pediatric patients are similar when used as monotherapy or as adjunctive therapy for the treatment of partial-onset seizures and as adjunctive therapy for the treatment of primary generalized tonic-clonic seizures.
In the elderly (>65 years), dose and body-weight normalized AUC and Cmaxis about 20% increased compared to young subjects (18-64 years). This may be related to body weight and decreased renal function in elderly subjects.
Lacosamide clinical trials indicate that gender does not have a clinically relevant influence on the pharmacokinetics of lacosamide.
There are no clinically relevant differences in the pharmacokinetics of lacosamide between Asian, Black, and Caucasian subjects.
There are no clinically relevant differences in the pharmacokinetics of lacosamide between CYP2C19 poor metabolizers and extensive metabolizers. Results from a trial in poor metabolizers (PM) (N=4) and extensive metabolizers (EM) (N=8) of cytochrome P450 (CYP) 2C19 showed that lacosamide plasma concentrations were similar in PMs and EMs, but plasma concentrations and the amount excreted into urine of the O-desmethyl metabolite were about 70% reduced in PMs compared to EMs.
In vitro metabolism studies indicate that lacosamide does not induce the enzyme activity of drug metabolizing cytochrome P450 isoforms CYP1A2, 2B6, 2C9, 2C19 and 3A4. Lacosamide did not inhibit CYP 1A1, 1A2, 2A6, 2B6, 2C8, 2C9, 2D6, 2E1, 3A4/5 at plasma concentrations observed in clinical studies.
Lacosamide was not a substrate or inhibitor for P-glycoprotein.
Lacosamide is a substrate of CYP3A4, CYP2C9, and CYP2C19. Patients with renal or hepatic impairment who are taking strong inhibitors of CYP3A4 and CYP2C9 may have increased exposure to lacosamide.
Since <15% of lacosamide is bound to plasma proteins, a clinically relevant interaction with other drugs through competition for protein binding sites is unlikely.
• Drug interaction studies with AEDs
o
Lacosamide 400 mg/day had no influence on the pharmacokinetics of 600 mg/day valproic acid and 400 mg/day carbamazepine in healthy subjects.
The placebo-controlled clinical studies in patients with partial-onset seizures showed that steady-state plasma concentrations of levetiracetam, carbamazepine, carbamazepine epoxide, lamotrigine, topiramate, oxcarbazepine monohydroxy derivative (MHD), phenytoin, valproic acid, phenobarbital, gabapentin, clonazepam, and zonisamide were not affected by concomitant intake of lacosamide at any dose.
o
Drug-drug interaction studies in healthy subjects showed that 600 mg/day valproic acid had no influence on the pharmacokinetics of 400 mg/day lacosamide. Likewise, 400 mg/day carbamazepine had no influence on the pharmacokinetics of lacosamide in a healthy subject study. Population pharmacokinetics results in patients with partial-onset seizures showed small reductions (15% to 20% lower) in lacosamide plasma concentrations when lacosamide was coadministered with carbamazepine, phenobarbital or phenytoin.
• Drug-drug interaction studies with other drugs
o Digoxin
There was no effect of lacosamide (400 mg/day) on the pharmacokinetics of digoxin (0.5 mg once daily) in a study in healthy subjects.
o
There were no clinically relevant changes in metformin levels following coadministration of lacosamide (400 mg/day).
Metformin (500 mg three times a day) had no effect on the pharmacokinetics of lacosamide (400 mg/day).
o
Omeprazole is a CYP2C19 substrate and inhibitor.
There was no effect of lacosamide (600 mg/day) on the pharmacokinetics of omeprazole (40 mg single dose) in healthy subjects. The data indicated that lacosamide had little in vivo inhibitory or inducing effect on CYP2C19.
Omeprazole at a dose of 40 mg once daily had no effect on the pharmacokinetics of lacosamide (300 mg single dose). However, plasma levels of the O-desmethyl metabolite were reduced about 60% in the presence of omeprazole.
o
Midazolam is a 3A4 substrate.
There was no effect of lacosamide (200 mg single dose or repeat doses of 400 mg/day given as 200 mg BID) on the pharmacokinetics of midazolam (single dose, 7.5 mg), indicating no inhibitory or inducing effects on CYP3A4.
o
There was no influence of lacosamide (400 mg/day) on the pharmacodynamics and pharmacokinetics of an oral contraceptive containing 0.03 mg ethinylestradiol and 0.15 mg levonorgestrel in healthy subjects, except that a 20% increase in ethinylestradiol Cmaxwas observed.
Co-administration of lacosamide (400 mg/day) with warfarin (25 mg single dose) did not result in a clinically relevant change in the pharmacokinetic and pharmacodynamic effects of warfarin in a study in healthy male subjects.
• Dose adjustment is recommended for mild or moderate hepatic impairment; use in patients with severe hepatic impairment is not recommended (
For patients with mild or moderate hepatic impairment, a reduction of 25% of the maximum dosage is recommended. The dose initiation and titration should be based on clinical response and tolerability in patients with hepatic impairment.
Lacosamide tablets use is not recommended in patients with severe hepatic impairment.
Dose reduction may be necessary in patients with hepatic impairment who are taking strong inhibitors of CYP3A4 and CYP2C9
The pharmacokinetics of lacosamide have been studied in healthy adult subjects (age range 18 to 87), adults with partial-onset seizures, adults with diabetic neuropathy, and subjects with renal and hepatic impairment. The pharmacokinetics of lacosamide are similar in healthy subjects, patients with partial-onset seizures, and patients with primary generalized tonic-clonic seizures.
Lacosamide is completely absorbed after oral administration with negligible first-pass effect with a high absolute bioavailability of approximately 100%. The maximum lacosamide plasma concentrations occur approximately 1-to-4-hour post-dose after oral dosing, and elimination half-life is approximately 13 hours. Steady state plasma concentrations are achieved after 3 days of twice daily repeated administration. Pharmacokinetics of lacosamide are dose proportional (100-800 mg) and time invariant, with low inter- and intra-subject variability. Compared to lacosamide the major metabolite, O-desmethyl metabolite, has a longer Tmax(0.5 to 12 hours) and elimination half-life (15-23 hours).
Lacosamide is completely absorbed after oral administration. The oral bioavailability of lacosamide tablets is approximately 100%. Food does not affect the rate and extent of absorption.
After intravenous administration, Cmaxis reached at the end of infusion. The 30- and 60-minute intravenous infusions are bioequivalent to the oral tablet. For the 15-minute intravenous infusion, bioequivalence was met for AUC(0-tz)but not for Cmax. The point estimate of Cmaxwas 20% higher than Cmaxfor oral tablet and the 90% CI for Cmaxexceeded the upper boundary of the bioequivalence range.
In a trial comparing the oral tablet with an oral solution containing 10 mg/mL lacosamide, bioequivalence between both formulations was shown.
A single loading dose of 200 mg approximates steady-state concentrations comparable to the 100 mg twice daily oral administration.
The volume of distribution is approximately 0.6 L/kg and thus close to the volume of total body water. Lacosamide is less than 15% bound to plasma proteins.
Lacosamide is primarily eliminated from the systemic circulation by renal excretion and biotransformation.
After oral administration of 100 mg [14C]-lacosamide approximately 95% of radioactivity administered was recovered in the urine and less than 0.5% in the feces. The major compounds excreted were unchanged lacosamide (approximately 40% of the dose), its O-desmethyl metabolite (approximately 30%), and a structurally unknown polar fraction (~20%). The plasma exposure of the major human metabolite, O-desmethyl-lacosamide, is approximately 10% of that of lacosamide. This metabolite has no known pharmacological activity.
The CYP isoforms mainly responsible for the formation of the major metabolite (O-desmethyl) are CYP3A4, CYP2C9, and CYP2C19. The elimination half-life of the unchanged drug is approximately 13 hours and is not altered by different doses, multiple dosing or intravenous administration.
There is no enantiomeric interconversion of lacosamide.
Lacosamide and its major metabolite are eliminated from the systemic circulation primarily by renal excretion.
The AUC of lacosamide was increased approximately 25% in mildly (CLCR50-80 mL/min) and moderately (CLCR30-50 mL/min) and 60% in severely (CLCR≤30 mL/min) renally impaired patients compared to subjects with normal renal function (CLCR>80 mL/min), whereas Cmaxwas unaffected. Lacosamide is effectively removed from plasma by hemodialysis. Following a 4-hour hemodialysis treatment, AUC of lacosamide is reduced by approximately 50%
Lacosamide undergoes metabolism. Subjects with moderate hepatic impairment (Child-Pugh B) showed higher plasma concentrations of lacosamide (approximately 50-60% higher AUC compared to healthy subjects). The pharmacokinetics of lacosamide have not been evaluated in severe hepatic impairment
The pediatric pharmacokinetic profile of lacosamide was determined in a population pharmacokinetic analysis using sparse plasma concentration data obtained in two open-label studies in 79 pediatric patients with partial -onset seizures that included patient 4 years to less than 17 years age.
A weight based dosing regimen is necessary to achieve lacosamide exposures in pediatric patients 4 years to less than 17 years of age similar to those observed in adults treated at effective doses of lacosamide
The pharmacokinetics of lacosamide in pediatric patients are similar when used as monotherapy or as adjunctive therapy for the treatment of partial-onset seizures and as adjunctive therapy for the treatment of primary generalized tonic-clonic seizures.
In the elderly (>65 years), dose and body-weight normalized AUC and Cmaxis about 20% increased compared to young subjects (18-64 years). This may be related to body weight and decreased renal function in elderly subjects.
Lacosamide clinical trials indicate that gender does not have a clinically relevant influence on the pharmacokinetics of lacosamide.
There are no clinically relevant differences in the pharmacokinetics of lacosamide between Asian, Black, and Caucasian subjects.
There are no clinically relevant differences in the pharmacokinetics of lacosamide between CYP2C19 poor metabolizers and extensive metabolizers. Results from a trial in poor metabolizers (PM) (N=4) and extensive metabolizers (EM) (N=8) of cytochrome P450 (CYP) 2C19 showed that lacosamide plasma concentrations were similar in PMs and EMs, but plasma concentrations and the amount excreted into urine of the O-desmethyl metabolite were about 70% reduced in PMs compared to EMs.
In vitro metabolism studies indicate that lacosamide does not induce the enzyme activity of drug metabolizing cytochrome P450 isoforms CYP1A2, 2B6, 2C9, 2C19 and 3A4. Lacosamide did not inhibit CYP 1A1, 1A2, 2A6, 2B6, 2C8, 2C9, 2D6, 2E1, 3A4/5 at plasma concentrations observed in clinical studies.
Lacosamide was not a substrate or inhibitor for P-glycoprotein.
Lacosamide is a substrate of CYP3A4, CYP2C9, and CYP2C19. Patients with renal or hepatic impairment who are taking strong inhibitors of CYP3A4 and CYP2C9 may have increased exposure to lacosamide.
Since <15% of lacosamide is bound to plasma proteins, a clinically relevant interaction with other drugs through competition for protein binding sites is unlikely.
• Drug interaction studies with AEDs
o
Lacosamide 400 mg/day had no influence on the pharmacokinetics of 600 mg/day valproic acid and 400 mg/day carbamazepine in healthy subjects.
The placebo-controlled clinical studies in patients with partial-onset seizures showed that steady-state plasma concentrations of levetiracetam, carbamazepine, carbamazepine epoxide, lamotrigine, topiramate, oxcarbazepine monohydroxy derivative (MHD), phenytoin, valproic acid, phenobarbital, gabapentin, clonazepam, and zonisamide were not affected by concomitant intake of lacosamide at any dose.
o
Drug-drug interaction studies in healthy subjects showed that 600 mg/day valproic acid had no influence on the pharmacokinetics of 400 mg/day lacosamide. Likewise, 400 mg/day carbamazepine had no influence on the pharmacokinetics of lacosamide in a healthy subject study. Population pharmacokinetics results in patients with partial-onset seizures showed small reductions (15% to 20% lower) in lacosamide plasma concentrations when lacosamide was coadministered with carbamazepine, phenobarbital or phenytoin.
• Drug-drug interaction studies with other drugs
o Digoxin
There was no effect of lacosamide (400 mg/day) on the pharmacokinetics of digoxin (0.5 mg once daily) in a study in healthy subjects.
o
There were no clinically relevant changes in metformin levels following coadministration of lacosamide (400 mg/day).
Metformin (500 mg three times a day) had no effect on the pharmacokinetics of lacosamide (400 mg/day).
o
Omeprazole is a CYP2C19 substrate and inhibitor.
There was no effect of lacosamide (600 mg/day) on the pharmacokinetics of omeprazole (40 mg single dose) in healthy subjects. The data indicated that lacosamide had little in vivo inhibitory or inducing effect on CYP2C19.
Omeprazole at a dose of 40 mg once daily had no effect on the pharmacokinetics of lacosamide (300 mg single dose). However, plasma levels of the O-desmethyl metabolite were reduced about 60% in the presence of omeprazole.
o
Midazolam is a 3A4 substrate.
There was no effect of lacosamide (200 mg single dose or repeat doses of 400 mg/day given as 200 mg BID) on the pharmacokinetics of midazolam (single dose, 7.5 mg), indicating no inhibitory or inducing effects on CYP3A4.
o
There was no influence of lacosamide (400 mg/day) on the pharmacodynamics and pharmacokinetics of an oral contraceptive containing 0.03 mg ethinylestradiol and 0.15 mg levonorgestrel in healthy subjects, except that a 20% increase in ethinylestradiol Cmaxwas observed.
Co-administration of lacosamide (400 mg/day) with warfarin (25 mg single dose) did not result in a clinically relevant change in the pharmacokinetic and pharmacodynamic effects of warfarin in a study in healthy male subjects.
• 50 mg: Pink coloured, biconvex, oval shaped, film coated tablets debossed with “T12” on one side and plain on other side.
• 100 mg: Yellow coloured, biconvex, oval shaped, film coated tablets debossed with “T13” on one side and plain on other side.
• 150 mg: Salmon coloured, biconvex, oval shaped, film coated tablets debossed with “T14” on one side and plain on other side.
• 200 mg: Blue coloured, biconvex, oval shaped, film coated tablets debossed with “T15” on one side and plain on other side.
• Pregnancy: Based on animal data, may cause fetal harm (
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/.
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
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 2-4% and 15-20%, respectively.
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.
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.
None.