Prolonged-action multiple-layer tablets

A prolonged-action multiple-layer tablet having an increased rate of dissolution of the active ingredient from a given point of time onward is disclosed. The table comprises layer A made of an intimate mixture of a water-insoluble wax that has an average particle size of 10 µm or less and which is solid at ordinary temperatures, a disintegrator and a binder, and layer B made of an intimate mixture of a water-insoluble wax that has an average particle size of 10 µm or less and which is solid at ordinary temperatures, a disintegrator, a binder and the active ingredient. In the tablet, a quick-release layer containing the active ingredient may be formed on either layer A or B.