p hydroxybenzoate/cough

Liquid chromatographic methods were developed for the determination of bromhexine hydrochloride, methyl p-hydroxybenzoate and propyl p-hydroxybenzoate (method A) and dextromethorphan hydrobromide (method B) in cough-cold syrup formulations. Reversed-phase analytical columns (150 mm x 3.9 mm i.d.)

A stability indicating high performance liquid chromatography procedure has been developed for the simultaneous determination of guaifenesin (GUA), methyl p-hydroxybenzoate (MHB) and propyl p-hydroxybenzoate (PHB) in a commercial cough syrup dosage form. The method was specific and stability

A double-blind cross-over trial was carried out to evaluate the antitussive activity of viminol p-hydroxybenzoate; the comparison was done with three preparations: a placebo and the drug at two doses, 70 and 140 mg respectively. The responses were scored hourly up to 4 hours after the administration