valproic acid drug pathway 2013-08-28T14:01:08Z PW:0001451 The pharmacokinetics and pharmacodynamics pathway of valproic acid, a branched short-chain fatty acid derived from valeric acid used as a mood-stabilizing drug and in the treatment of epilepsy. More recently it has also been found to inhibit the proliferation of cancers. Genetic variations can result in changes in drug availability and can cause differences in the response of the organism to the drug. pathway valproate drug pathway vpetri antiepileptic drug pathway