Erythrol tetranitrate, C_{4}H_{6}(NO_{3})_{4} = C_{4}H_{6}O_{12}N_{4},
the tetranitrate of erythrite or butane-tetrol, C_{4}H_{6}(OH)_{4}.
Actions and Uses.—It is a vasodilator and antispasmodic, like
nitroglycerin. Its action is slower and more lasting; it begins in 15
minutes and persists for three or four hours. It is recommended in
angina pectoris and cardiac diseases. It is reported as especially
useful as a prophylactic in preventing anginal pain. Dosage.—Because of
its explosiveness it is marketed in the form of tablets, each containing
0.03 gramme (½ grain). One or two tablets every four to six hours.
Manufactured by E. Merck, Darmstadt (Merck & Co., New York).