New, accurate, sensitive and reliable kinetic spectrophotometric method for the assay of fluvastatin sodium (FVS) in pure form and capsules has been developed. The method involves the oxidative coupling reaction of FVS with 3-methyl-2-benzothiazolinone hydrazone hydrochloride monohydrate (MBTH) in the presence of Ce(IV) in an acidic medium to form colored product with lambdamax at 615 nm.