Drug Excipient Interaction Study with Polymorphic Forms of Tibolone

作者：Araujo Gabriel L B^*; Salvio Neto Helio; Zaim Marcio H; Matos Jivaldo R

来源：Latin American Journal of Pharmacy, 2010, 29(3): 472-476.

• Drug-excipient interaction
• Polymorphism of drugs
• Solid-state characterization
• Thermal analysis

Powder mixtures (1:1) of tibolone polymorphic forms I (monoclinic) and II (triclinic) and excipients have been prepared and compacted. The samples were stored at 50 degrees C and 90% RH for one month and subsequently were evaluated using differential scanning calorimetry (DSC) and high-performance liquid chromatography (HPLC). The results indicate that during the compaction, the applied pressure reduced the chemical stability of tibolone in both polymorph forms. The triclinic form was more chemically unstable, both pure and in contact with excipients, than the monoclinic form. Lactose monohydrate was shown to reduce chemical degradation for both forms. Ascorbyl palmitate was shown to affect the tibolone stability differently depending on the polymorphic form used.

• 出版日期2010-5