The invention discloses a novel
metformin hydrochloride solid medicinal preparation and a preparation method thereof. The novel
metformin hydrochloride solid medicinal preparation comprises, by weight, 300-800 parts of
metformin hydrochloride as a main
drug of a tablet core, 100-500 parts of auxiliary materials and 100-300 parts of
coating materials, wherein the auxiliary materials comprise a filling agent, a disintegrating agent, a bonding agent and a lubricating agent, and the
coating materials comprise 5-60 parts of gastric-soluble type polymethacrylate and 80-240 parts of enteric-soluble type polymethacrylate. The specific preparation method comprises the following steps that 1, after the main
drug is mixed with the filling agent and the disintegrating agent, the bonding agent is added into the mixture, and a soft material is prepared; 2, the soft material is sieved to form granules, and the granules are dried; 3, after
drying, the lubricating agent is added into the dried granules and mixed to be uniform, the tablet cores are formed through pressing; 4,
coating is performed, the weight is increased by 5%-20%, and then the novel
metformin hydrochloride solid medicinal preparation is obtained. The novel
metformin hydrochloride solid medicinal preparation has the advantages that the limitation that existing listed preparations can only be absorbed in the
stomach or the intestinal canal is overcome, the medicinal preparation is released in a balanced mode in a certain time, the medicinal preparation is absorbed continuously and stably, the medicinal preparation concentration in the blood is maintained for a long time, so that the
optimal treatment effect is achieved, the
treatment effect of the medicinal preparation is fully played, and meanwhile the untoward effect is reduced.