 However, modafinil sulfone does appear to possess anticonvulsant effects, and this is a property that it shares with modafinil.Modafinil and/or its major metabolite, modafinil acid, may be quantified in plasma, serum or urine to monitor dosage in those receiving the drug therapeutically, to confirm a diagnosis of poisoning in hospitalized patients or to assist in the forensic investigation of a vehicular traffic violation.Instrumental techniques involving gas or liquid chromatography are usually employed for these purposes.