Pharmaceutical preparation containing metformin and a process for producing it

摘要

PCT No. PCT/EP95/03610 Sec. 371 Date Mar. 14, 1997 Sec. 102(e) Date Mar. 14, 1997 PCT Filed Sep. 14, 1995 PCT Pub. No. WO96/08243 PCT Pub. Date Mar. 21, 1996The present invention concerns pharmaceutical compositions containing metformin as an active substance and a hydrocolloid-forming agent as a retardant and optionally standard pharmaceutical auxiliary substances, the residual moisture content in the pharmaceutical composition being 0.5-3% by weight. The invention also concerns a process for producing pharmaceutical compositions containing metformin as an active substance and a hydrocolloid-forming agent as a retardant and optionally standard pharmaceutical auxiliary substances characterized in that the active substance and retarding agent or a portion thereof are granulated with an aqueous solvent which can optionally contain a binder and where appropriate the other portion of the retardant or other standard pharmaceutical auxiliaries are admixed with the granulate which is then dried until the residual moisture content is reduced to 0.5-3% by weight.