Pharmaceutical Affairs Act Article 62

The prescriptions and books, as required under the provisions of Articles 59 through 60, shall be kept for at least a period of five (5) years.
中文原文 藥事法第62條
第五十九條及第六十條所規定之處方箋、簿冊,均應保存五年。

English translation for reference only; the Chinese text prevails. Not legal advice.