Three Layer Tablet Containing Cetirizine, Pseudoephedrine, and Naproxen

In one aspect, the present invention features a tablet including a first drug layer, a second drug layer, and a third drug layer, wherein (i) the first drug layer includes naproxen; (ii) a second drug layer including pseudoephedrine; and (iii) the third drug layer includes cetirizine; wherein the first drug layer is in contact with the second drug layer, the third drug layer is in contact with the second drug layer, and the first drug layer is not in contact with the third drug layer, and wherein the second drug layer is a sustained release layer adapted to deliver a therapeutically effective amount of pseudoephedrine for a period of at least twelve hours.