Influence of different types of commercially availablemicrocrystalline cellulose on degradation of perindopril erbumine and enalapril maleate in binary mixtures

Influence of some commercially available types of microcrystalline cellulose (MCC) on the stability of certain active pharmaceutical ingredients (APIs), when in contact, has been investigated. Two structurally similar APIs, perindopril erbumine (PER) and enalapril maleate (EM), both well-known angiotensin-converting enzyme inhibitors were used. The main properties of an MCC that could determine the stability for each API were measured and correlated to the stability of these two

APIs in binary mixtures. The stability of these APIs differed when in contact with different types of MCC. The dominant properties of MCC from one manufacturer were surface features that influenced the stability of PER and acidity that influenced the stability of EM. In the case of MCC from other manufacturers, unbound water was stability determining for both substances.

Keywords: microcrystalline cellulose, perindopril erbumineenalapril maleate, stability study, drug-excipient binary mixtures, excipient

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Influence of different types of commercially available microcrystalline cellulose on degradation of perindopril erbumine and enalapril maleate in binary mixtures
TANJA VEHOVEC1 ANDREJ GARTNER1 ODON PLANIN[EK2
ALE[ OBREZA2*
1 Krka d.d. Novo mesto, Stability, Testing Department, 8501 Novo mesto, Slovenia
2 University of Ljubljana, Faculty of Pharmacy, 1000 Ljubljana, Slovenia
Accepted September 18, 2012
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