11. Subjects who are currently taking a medication with a known drug interaction with Divalproex Sodium (betamipron, chaparral, cholestyramine, clarithromycin, comfrey, ethosuximide, evening primrose, felbamate, fosphenytoin, germander, ginkgo, jin bu huan, kava, mefloquine, panipenem, pennyroyal, primidone, rifampin, rifapentine, and zidovudine) and refuse to taper off of that medication.