The invention relates to a dosage form that is suitable for releasing an active ingredient over a long period of time. For this purpose, the active ingredient is released in two-stages in order to do away with an excessively frequent ingestion of the dosage form. The dosage forms according to the invention are for treating dizziness in humans. They are administered with or after a meal. The concept according to the invention provides that the pharmaceutical form has a dimensionally stable portion which, after ingestion of the dosage form by the patients, does not dissolve in the chyme-filled stomach for a number of hours. In this way, this dimensionally stable portion remains in the stomach until same is evacuated by the so-called “housekeeper waves”. Another portion of the dosage form is formed in such a way that it dissolves within a short time of the patients ingesting same. In this way, a quick invasion of the active ingredient with corresponding plasma levels is ensured.
