Based on the information provided, I cannot find evidence that lacosamide is approved for hypertension treatment. Lacosamide is primarily used for the treatment of epilepsy. It functions as an anti-epileptic drug, used to manage partial-onset seizures in adults and children over the age of 4.

Lacosamide is available as an oral medication in immediate-release and extended-release tablets, as well as an injection for intravenous use. It operates by reducing abnormal electrical activity in the brain, which helps to control seizures.

To summarize, lacosamide is not approved for hypertension treatment. It is primarily used for the management of partial-onset seizures in adults and children over the age of 4.

Sources:

1. [DrugPatentWatch.com - Lacosamide](https://www.drugpatentwatch.com/drugs/lacosamide)
2. [Mayo Clinic - Lacosamide (Oral Route) Description and Brand Names](https://www.mayoclinic.org/drugs-supplements/lacosamide-oral-route/description/drg-20066334)
3. [U.S. National Library of Medicine - Lacosamide](https://medlineplus.gov/druginfo/meds/a611045.html)