The 1994 Physicians Desk Reference (PDR) lists the produce QUINAMM which in addition to inert substances containes quinine sulfate in tablets. There is 260 mg of quinine sulfate in each tablet. It is listed as "For the prevention and treatment of nocturnal recumbency leg muscle cramps." Dosage is given as one tablet before retiring. A list of side effects includes as the most common ones as ringing ears, dizziness ski rash and intestinal cramping. Fatalaties with dosages between 2 and 8 grams have been reported.