The present invention relates to a method for preventing the crystallisation of an active pharmaceutical ingredient in a polymer film, wherein the solvent-containing coating compound, which has been doctored to make the polymer film and which comprises a matrix-forming polymer or polymer mixture and at least one active pharmaceutical ingredient, is temporarily dried at temperatures that exceed the melting temperature of the active pharmaceutical ingredient contained in the coating compound by at least 10 ℃. The maximum temperature is thus higher than the temperature necessary for mere drying and saves an additional time-consuming and costly operational step.本發明係關於一種防止聚合物薄膜中活性藥劑成分結晶化的方法，其中該聚合物薄膜係由已摻藥的含溶劑塗覆組成物形成，該已摻藥的含溶劑塗覆組成物包含基質形成性聚合物或聚合物混合物以及至少一種活性藥劑成分；該方法之特徵為該已摻藥的含溶劑塗覆組成物係在短暫超過含於該塗覆組成物之該活性藥劑成分的熔融溫度至少10℃的溫度進行乾燥。最高溫度因此高於僅是乾燥所需的溫度，且省去費時及昂貴的額外操作步驟。
