What is the definition or description of: valproic acid?

Depakote: Valproic acid was the first product followed by valproex sodium (depakote, far less toxic). A drug approved by fda to treat migraine and/or epilepsy, and often used in psychiatry in addition. Very potent and valuable agent in view of broad spectrum benefits, but side effects and pregnancy risks very real.

See below: Valproic acid (vpa), an acidic chemical compound, has found clinical use as an anticonvulsant and mood-stabilizing drug, primarily in the treatment of epilepsy, bipolar disorder, and, less commonly, major depression. It is also used to treat migraine headaches and schizophrenia.