Phensuximide is a medication that is primarily used to treat epilepsy. It works by suppressing abnormal electrical activity in the brain. However, it is always useful to have synonyms or alternative names for medications, especially when communicating with medical professionals. Some synonyms for phensuximide are Ethosuximide, Petinimid, Methsuximide, Abstrect, and Succesil. Ethosuximide is the most commonly used synonym for phensuximide. However, it is important to note that although these medications may have similar effects, they may also have their own unique mechanisms of action and side effects. Therefore, it is crucial to seek medical advice before making any medication changes.