Double capsule for the administration of active principles in multiple therepies

A pharmaceutical dosage form particularly suitable for the administration of active principles in multiple therapies is disclosed. The pharmaceutical dosage form is a double capsule where in an internal capsule is placed inside an external one. Each internal and external capsule includes one or more active principles. A double capsule according to the invention is preferably used in triple or quadruple therapies against the microorganisms Helicobacter Pylori. Advantages of this pharmaceutical dosage form consist in providing a simple posology for administration of two and more active principles, allowing the active principles to activate at the right intervals of time and in the preestablished quantities, and preventing interactions between active principles. In a preferred embodiment of the invention, the pharmaceutical dosage form has an external capsule containing bismuth subcitrate and metronidazole, and an internal capsule containing tetracycline and optionally omeprazole, which is used in therapy for eradication of Helicobacter pylori.