A tablet for oral administration comprises a matrix of progressive and continuous released magnesium. For the administration of 90 to 110 parts by weight of magnesium, the matrix comprises 180 to 190 parts by weight of hydroxypropylmethylcellulose, 19.8 to 22.2 parts by weight of glyceryl behenate, 10 to 12 parts by weight of lactose and 10 to 12 parts by weight of colloidal silica. A non-enteric protective coating that slows down the gastric dissolution of the magnesium may comprise 15 to 75 parts by weight of shellac, cellulose ether or a mixture thereof. The tablet may be administered to patients in need thereof.
