The aim of this work was to select an appropriate primary packaging and analysis of its influence on stability, of tablets containing Carvedilol (Karvileks, Zdravlje-Actavis, Serbia). The influence of different primary packaging materials and doses radiation was investigated. Karvileks tablets were put in an opaque plastic container, red and white blister packs, composed of polyvinyl chloride and aluminum foil (PVC/Al). After radiation, the content was estimated using a validated HPLC method. Tablets, packaged in different primary packaging materials, were exposed at different doses of UV and VIS radiation. In case of blister packs, the content of active substance was lower than 85% compared with an initial content. Tablets packaged in the opaque plastic containers, the content of carvedilol was not lower than 90%, after radiation. The study showed that the opaque plastic containers provide better photo protection than red and white blister packs for solid oral dosage forms of Karvileks
