Purpose: To develop and optimise sustained release (SR) matrix tablets of diltiazem hydrochloride (DHL). Methods: DHL tablets were prepared by direct compression and consisted of hydroxyprpoylmethyl cellulose, Kollidon SR and Eudragit RSPO. A 3 full factorial design was applied to study the effect of polymers used on drug release from the DHL. The tablets were also evaluated for physicochemical...

       Cyclosporine (CsA) is a drug that has been used for prevention of kidney transplant rejection for many years. Diltiazem with the inhibition of cyclosporine metabolism and clearance will increase CsA concentration and CsA dose can be decreased. The aim of this study was the evaluation of diltiazem effect on CsA dose adjustment with respect to C2. Forty stable renal transplant p...

A stability-indicating liquid chromatographic method has been developed and validated for the determination of Diltiazem Hydrochloride (DTZ) together with its six related substances (Diltiazem sulphoxide, Imp-A, Imp-B, Imp-D, Imp-E, and Imp-F) in a laboratory mixture as well as in a novel tablet formulation developed in-house. Efficient chromatographic separation was achieved on a Hypersil BDS ...