It is provided an orally disintegrating pharmaceutical dosage form comprising cranberry extract in an amount from 3 to 18% by weight relative to the total weight of the composition, a therapeutically effective amount of vitamin C, a hydrophobic colloidal silicon dioxide, a diluent, and one or more another pharmaceutically acceptable excipients or carriers. It is also provided the oral dissolvable pharmaceutical dosage form for use in the prophylaxis and/or treatment of gingivitis or periodontitis.