The pharmaceutical dosage form consists of a plurality of units containing a benzimidazole compound labile in an acid medium as the active principle, each unit being comprised of an inert core, a layer containing the active principle and an intermediate layer. These units, mixed with compression excipients, compressed and coated with an enteric coating, provide a tableted pharmaceutical dosage form suitable for oral administration for preventing and treating disorders related to abnormal secretion of gastric acid.