Duloxetine hydrochloride enteric micropill preparation

The invention relates to a duloxetine hydrochloride enteric micropill preparation which is composed of a drug-carrying pill core, an isolating coating layer and an enteric coating layer. When the enteric materials in the prescription adopt common methacrylic acid copolymers, sugar alcohol can be added into the isolating layer to achieve the goal that the active component in-vitro dissolution curve is consistent with a positive control drug (Cymbalta of Eli Lilly and Company). The product has the advantages of high acid resistance, high dissolution speed, high rate and the like; the methacrylic acid copolymers used as the enteric material are easy to purchase and low in cost; and the adopted conventional preparation method is simple in technique and suitable for industrial production, thereby providing a drug with reasonable price and reliable curative effect for patients with melancholia.