Study of forced degradation of amlodipine besylate and bisoprolol fumarate by application of hydrophilic interaction liquid chromatography

Abstract

Currently, in pharmaceutical analysis, great importance is given to forced degradation studies, which can greatly help to predict the shelf life of the drug, but also for identification of possible degradation products. These studies enable investigation of stability indicating method, then it is used to test the active substances intrinsic/inner molecular stability, as well as defining active substances impurity profiles. In this work forced degradation studies of amlodipine besylate and bisoprolol fumarate either individually and in mixtures, was performed, where the method of hydrophilic interaction liquid chromatography was used, and any possible changes in the concentration of samples were followed. The results showed that the test compounds are sensitive to the tested stress agents, especially amlodipine besylate, and that both of these compounds showed increased stability in the mixture in comparison to individual analysis.

U savremenim farmaceutskim analizama danas se veliki značaj pridaje studijama forsirane degradacije, koje mogu u velikoj mjeri pomoći u predviđanju roka upotrebe lijeka, ali i u identifikaciji mogućih proizvoda degradacije. Ove studije omogućavaju ispitivanje specifičnosti stability indicating metode, zatim koriste se za ispitivanje intrinzičke/unutrašnje stabilnosti molekule aktivnih supstanci, kao i za definisanje profila nečistoća aktivnih supstanci. U ovom radu vršena je studija forsirane degradacije amlodipin-besilata i bisoprolol-fumarata pojedinačno i u smješi, gdje se kao metoda koristila tečna hromatografija hidrofilnih interakcija, kojom su se pratile promjene koncentracije ispitivanih uzoraka. Rezultati ispitivanja pokazali su da su ispitivana jedinjenja osjetljiva na većinu ispitivanih stres agenasa, naročito amlodipinbesilat, kao i da su oba ova jedinjenja pokazala veću stabilnost u smješi, nego kad su pojedinačno analizirana.