Abstract: The present invention relates to a stable pharmaceutical composition comprising a combination of chlordiazepoxide hydrochloride and clidinium bromide and one or more pharmaceutically acceptable excipients, wherein the composition is in the form of solid oral dosage forms like capsule and sachet. The technical challenges like undesirable impurities in dosage form were successfully controlled by using: a) low moisture excipients; and b) formulation development under controlled temperature and controlled humidity conditions. The formulations as per the present invention are stable and exhibit desired pharmaceutical technical attributes like assay and dissolution. The prepared formulations are useful for the treatment of gastrointestinal disorders and various other therapeutic indications as described herein.