" Some anti-epileptic drugs and other medications can cause dental problems, producing symptoms such as bad breath... ...and sore or swollen gums. Dental complications have been closely associated with the use of Dilantin, a commonly prescribed anti-epileptic drug, while anecdotal evidence suggests that other medications may also cause problems in some people. Dilantin can produce gingival hyperplasia, a condition which results in painful, swollen, red gums. This is more common among children who are on this medication.On a personal note, I've experienced most of the above. I was on heavy doses of dilantin, mycilin, and phenobarbitone from ages eight to sixteen. My upper teeth did not develop properly, and grew behind my lower set (something only corrected in 1997 by use of orthodontic work). I also experienced coarsening of features and extra hair growth. These were not that much an issue until I finally came out as being transsexual and began gender transition.Other problems... ...include coarsening of facial features, extra body hair growth (often in women) and acne. If Dilantin has been introduced in high doses at an early age, the position of the teeth and supporting bone structure, and the development of the child's skull, can all be affected to varying degrees. Therefore it is very important to pay close attention to teeth and gums. "
There are other possible side effects as well for Anti-epileptic drugs in general. Drowsiness, drooling, and behavioural changes can occur in some individuals, particularly those that have brain damage in addition to epilepsy. Over-medication, especially of barbiturates, can also cause problems with concentration and attention spans. Some drugs will cause memory and cognitive problems.
Still, modern drug usage on the whole seems preferable to earlier treatments for epilepsy. These included incarceration into asylums, use of more disruptive drugs (such as bromide), shock treatment, and lobotomies!