The climatic condition changes as we move across the globe, which means that the climatic condition is different in a different part of the world. The stability of pharmaceutical product is influenced by climatic conditions. Hence, the stability study of the pharmaceutical product needs to be studied keeping in mind the climatic conditions of the country. As per ICH guidelines for stability studies, the climate of the world is divided into four different zones (Zone I, II, III, IV.). Zone IV is further divided into two, zone IV A and zone IV B.
Climatic Zones -Stability testing of active pharmaceutical ingredients and finished pharmaceutical products: Stability conditions for WHO Member States by Region
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