The present invention relates to a pharmaceutical composition, preferably a pharmaceutical dosage form, comprising at least two separate compartments, wherein one compartment contains a composition comprising metformin or a pharmaceutically acceptable salt thereof and wherein another compartment contains a composition comprising sitagliptin. The present invention also relates to a process for preparing dosage forms comprising metformin or a pharmaceutically acceptable salt thereof and sitagliptin or a pharmaceutically acceptable salt thereof, the process comprising the steps of: a) providing one composition containing metformin or a pharmaceutically acceptable salt thereof and optionally also sitagliptin, b) providing a further composition containing sitagliptin or a pharmaceutically acceptable salt thereof and optionally also metformin, and c) combining the compositions to form compartments. The present invention also refers to a process for preparing dosage forms comprising at least one compartment comprising metformin or a pharmaceutically acceptable salt thereof and sitagliptin or a pharmaceutically acceptable salt thereof, the process comprises providing a composition containing metformin or a pharmaceutically acceptable salt thereof, and sitagliptin or a pharmaceutically acceptable salt thereof, and a matrix agent. Moreover, the present invention related to a dosage form obtained by said process, and to the use of said dosage form for the treatment of diabetes.Cette invention concerne une composition pharmaceutique, de préférence, une forme galénique pharmaceutique, comprenant au moins deux compartiments distincts, un des compartiments contenant une composition comprenant la metformine ou un de ses sels pharmaceutiquement acceptables et lautre contenant une composition comprenant la sitagliptine. Cette invention concerne également un procédé de préparation desdites formes galéniques contenant la metformine ou un de ses sels pharmaceutiquement acceptables et la
