_*Serum Antidiphthericum Purificatum (Ser. Antidiph. Purif.), Purified Antidiphtheric Serum, U.S.P._ (Antidiphtheric Globulins, Concentrated Diphtheria Antitoxin, Diphtheric Antitoxin Globulins, Refined and Concentrated Diphtheria Antitoxin).--Certain antitoxic proteins from the blood serum of a horse properly immunized against diphtheria toxin, dissolved in physiologic solution of sodium chloride. USES: Less apt to produce serum disease. DOSAGE: Curative, 10,000 units (U.S.P.); protective, 1,000 units (U. S, P.); both hypodermic. _*Serum Antidiphthericum Siccum (Ser. Antidiph. Sicc.), Dried Antidiphtheric Serum, U.S.P._ (Dried Diphtheria Antitoxin). DOSAGE: Curative, 10,000 units (U.S.P.); protective, 1,000 units (U.S.P.); both hypodermic =*Serum Antitetanicum (Ser. Antitetan.), Antitetanic Serum, U.S.P.= (Tetanus Antitoxin).--Serum from a horse properly immunized against tetanus toxin, dissolved in physiologic solution of sodium chloride. ACTION AND USES: Prophylactic agent in tetanus; also used for curative purposes. DOSAGE: Curative, 10,000 units (U.S.P.); protective, 1,500 units (U.S.P.); both hypodermic. _*Serum Antitetanicum Purificatum (Ser. Antitetan. Purif.), Purified Antitetanic Serum, U.S.P._ (Antitetanic Globulins, Concentrated Tetanus Antitoxin, Refined and Concentrated Tetanus Antitoxin, Tetanus Antitoxic Globulins).--Certain antitoxic proteins from the serum of a horse properly immunized against tetanus toxin. DOSAGE: Curative, 10,000 units (U.S.P.); protective, 1,500 units (U.S.P.); both hypodermic. _*Serum Antitetanicum Siccum (Ser. Antitetan. Sicc.), Dried Antitetanic Serum, U.S.P._ (Dried Tetanus Antitoxin). USES: May be used as a dusting powder in suspicious wounds. DOSAGE: Curative, 10,000 units (U.S.P.); protective, 1,500 units (U.S.P.); both hypodermic. =Sevum Praeparatum (Sev. Praep.), Prepared Suet, U.S.P.= (Mutton Suet). A white, solid, almost odorless fat, having a bland taste when fresh, but becoming rancid on prolonged exposure to air. ACTION AND USES: Used in the preparation of ointments and cerates. _Sevum Benzoinatum (Sev. Benz.), Benzoinated Suet, N.F._--Benzoin (3%) in prepared suet. USES: Ointment base; superfluous. =Sinapis Alba (Sinap. Alb.), White Mustard, U.S.P.= (Yellow Mustard).--Ripe seeds. ACTION AND USES: Develops irritant volatile oil on contact with water; frequently mixed with black mustard in powder for use as ground mustard. DOSAGE: Emetic, 10 Gm. or 2-1/2 drachms (U.S.P.). =*Sinapis Nigra (Sinap. Nig.), Black Mustard, U.S.P.= (Brown Mustard).--Ripe seeds. ACTION AND USES: See =Oleum Sinapis Volatile=. DOSAGE: Emetic, 10 Gm. or 2-1/2 drachms (U.S.P.). _*Emplastrum Sinapis (Emp. Sinap.), Mustard Plaster, U.S.P._ (Charta Sinapis, U.S.P. VIII, Mustard Paper).--A mixture of black mustard, deprived of its fixed oil, and a solution of rubber, spread on paper, cotton cloth or other fabric. USES: Counterirritant.