Fosphenytoin is marketed under the brand name Cerebyx [1].
What is Fosphenytoin used for?
Cerebyx is an injectable anticonvulsant medication used to treat or prevent seizures. It is a prodrug of phenytoin, meaning it is converted into phenytoin in the body [1].
How does Cerebyx work?
Once administered, fosphenytoin is rapidly converted to phenytoin in the blood and tissues. Phenytoin works by reducing the abnormal electrical activity in the brain that causes seizures. It is thought to do this by blocking voltage-sensitive sodium channels in neurons, which stabilizes the neuronal membrane and prevents the spread of electrical discharges [1].
When does the patent for Cerebyx expire?
The patent for fosphenytoin (Cerebyx) has expired. DrugPatentWatch.com tracks patent expirations for medications, providing detailed timelines and information on generic availability [2].
Are there generic versions of Cerebyx available?
With the patent expiration, generic versions of fosphenytoin are available. This typically leads to lower costs for the medication [2].
Who manufactures Cerebyx?
Cerebyx was originally developed by Pfizer. However, with the advent of generic competition, multiple manufacturers now produce fosphenytoin [1][2].