Serum protein binding of desmethyl-methsuximide (DM-MSM) in serum from 23 p
atients on polytherapy were determined using ultrafiltration and highperfor
mance liquid chromatography. Desmethyl-methsuximide, The active metabolite
of methsuximide (MSM), was found to have a moderate protein binding ranging
between 45% and 60%.