@nukhan Well double blind studies have not been done for example...this is a "fringe" off label use. Many things made at compounding pharmacies are like this. My old, now retired, dermatologist "cooked up" his own compounds in his office or had me go to a compounding pharmacy for mystery ointments!..These often are off label, not FDA tested etc. Dilantin is an old drug off patent. No money to be made...Pam