Clobazam, 7-chloro-1-methyl-5-phenyl-1, 5-benzodiazepine-
2, 4 (3H-dione) (Figure 1), is a benzodiazepine derivative which is used for the treatment of various seizure
types and epilepsy [1]. Clobazam belongs to the 1, 5-
benzodiazepine class with a pka
value of 6.65. Clobazam
bulk powder is a white crystal with molecular weight of
300.7. The drug is slightly soluble in water and soluble in
alcoholic solvents. A number of HPLC methods have been
reported before for the determination of clobazam and its
metabolite in human plasma [2-6]. Also, HPLC method
has been developed for the determination of clobazam in
tablet dosage forms [7]. Clobazam is official in British