Lacosamide is an antiepileptic drug used to treat partial-onset seizures in adults with epilepsy. According to the sources provided, the recommended dosage of lacosamide depends on the patient's age, weight, and medical condition.

For adults, the recommended starting dose of lacosamide is 50 mg twice daily, which can be increased by 50 mg every week until a maximum dose of 400 mg per day is reached [1][2]. The medication can be taken with or without food, and it is recommended to swallow the tablets whole, without crushing or chewing them.

For elderly patients over 65 years old, the starting dose should be 50 mg once daily, which can be increased by 50 mg every week until a maximum dose of 200 mg per day is reached [2]. The dose should be adjusted based on the patient's renal function.

For pediatric patients, the recommended dose of lacosamide depends on the child's weight and should be determined by a doctor [3]. The medication is not recommended for use in children under 17 years old.

It is important to follow the dosage instructions provided by a healthcare professional and not to exceed the recommended dose of lacosamide, as this can increase the risk of side effects. Common side effects of lacosamide include dizziness, headache, and nausea [1][2][3].

In conclusion, the recommended dosage of lacosamide varies depending on the patient's age, weight, and medical condition. The starting dose for adults is 50 mg twice daily, which can be increased gradually until a maximum dose of 400 mg per day is reached. Elderly patients should start with a lower dose of 50 mg once daily, and pediatric patients' doses should be determined by a doctor. It is important to follow the dosage instructions provided by a healthcare professional and not to exceed the recommended dose of lacosamide.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LACOSAMIDE
[2] https://reference.medscape.com/drug/vimpat-motpoly-xr-lacosamide-343026
[3] https://www.epilepsy.com/medications/lacosamide