Composition of 3-n-butylphthalide derivative, and preparation method thereof

The invention discloses a composition of a 3-n-butylphthalide derivative, and a preparation method thereof. The composition comprises the 3-n-butylphthalide derivative, a moistureproof coating layer, and other pharmaceutic adjuvants. The moistureproof coating layer comprises Opadry AMB. The invention also provides the preparation method of the composition of the 3-n-butylphthalide derivative. According to the preparation method, powder coating, particle coating, or tablet coating is adopted; Opadry AMB coating powder is dissolved in distilled water before coating so as to obtain a coating liquid after full dissolving.