Epitome of the Pharmacopeia of the United States and the National Formulary Part 49

Yellowish or brownish, fragrant, branched and lobed bands, or orange-buff or orange-brown powder, with a warm, aromatic taste.

ACTION AND USES: Aromatic flavor and carminative without advantage over cardamom.

DOSAGE: 0.5 Gm. or 8 grains (N.F.).

=MAGMATA, MAGMAS.=--Suspensions of insoluble or nearly insoluble substances.

=*Magnesii Carbonas (Mag. Carb.), Magnesium Carbonate, U.S.P.=--A mixture of magnesium carbonate and magnesium hydroxide.

Light, white, friable ma.s.ses or bulky white powder, odorless and with a slight earthy taste. Practically insoluble in water; insoluble in alcohol.

ACTION AND USES: Used internally against gastric hyperacidity and as a mild laxative; externally as dusting powder. See also Magma Magnesiae, under =Magnesii Hydroxidum=.

DOSAGE: 3 Gm. or 45 grains (U.S.P.).

_Mistura Magnesiae, Asafoetidae et Opii (Mist. Mag. Asafoet. et Opii), Mixture of Magnesia, Asafetida and Opium, N.F._ (Mistura Magnesiae et Asafoetidae, N.F. III, Dewees' Carminative).--Magnesium carbonate (5%), tincture of asafetida (7.5%), tincture of opium (1%), and sugar in water. Absolute alcohol content about 7 per cent.

USES: Complex and irrational mixture intended for use in diarrhea.

DOSAGE: 8 Cc. or 2 fluidrachms (N.F.).

=Magnesii Chloridum (Magnes. Chlorid.), Magnesium Chloride, N.F.=--MgCl{2} + 6H{2}O.

Colorless transparent crystals or white translucent pieces; deliquescent in moist air. Very soluble in water (1:0.6) and soluble in alcohol.

ACTION AND USES: Similar to but without advantage over magnesium sulphate.

DOSAGE: 15 Gm. or 4 drachms (N.F.).

=*Magnesii Citras, Magnesium Citrate.=

_*Liquor Magnesii Citratis (Liq. Mag. Cit.), Solution of Magnesium Citrate, U.S.P._--Magnesium citrate corresponding to not less than 1.5 per cent. of magnesium oxide.

USES: Efficient and not distasteful mild saline laxative.

DOSAGE: 350 Cc. or 12 fluidounces (1 bottle) (U.S.P.).

=Magnesii Hydroxidum, Magnesium Hydroxide.=

_Magma Magnesiae (Magma Mag.), Magnesia Magma, U.S.P._ (Milk of Magnesia).--A suspension of magnesium hydroxide in water [equivalent to about 7% Mg(OH){2}] forming a thick, white liquid.

USES: Widely used as mild alkaline laxative and tooth wash.

DOSAGE: 10 Cc. or 2-1/2 fluidrachms (U.S.P.).

=*Magnesii Oxidum (Mag. Oxid.), Magnesium Oxide, U.S.P.= (Magnesia, Calcined Magnesia, Light Magnesia).--MgO (not less than 96%).

A white, bulky, odorless powder with an earthy but not saline taste. Almost insoluble in water; insoluble in alcohol.

ACTION AND USES: Useful antacid and laxative.

DOSAGE: 2 Gm. or 30 grains (U.S.P.).

=Magnesii Oxidum Ponderosum (Mag. Oxid. Pond.), Heavy Magnesium Oxide, U.S.P.= (Heavy Magnesia).--MgO (96%).

White, dense powder.

ACTION AND USES: Used like magnesium oxide.

DOSAGE: 2 Gm. or 30 grains (U.S.P.).

=*Magnesii Sulphas (Mag. Sulph.), Magnesium Sulphate, U.S.P.= (Epsom Salt).--MgSO{4} + 7H{2}O.

Small, colorless, odorless crystals, with a cooling, saline, bitter taste. Freely soluble in water (1:1); almost insoluble in alcohol.

ACTION AND USES: One of the most active of the saline cathartics.

DOSAGE: 15 Gm. or 4 drachms (U.S.P.), in solution. A solution containing 1 Gm. of salt in each Cc. may be given, 5 Cc. every hour until a laxative effect is secured. This should usually be diluted with water.

_Liquor Magnesii Sulphatis Effervescens (Liq. Mag. Sulph. Eff.), Effervescent Solution of Magnesium Sulphate, N.F._--Magnesium sulphate (about 7%) with syrup of citric acid, pota.s.sium citrate and water.

DOSAGE: The contents of a bottle, about 350 Cc. or nearly 12 fluidounces (N.F.).

=Maltum (Maltum), Malt, U.S.P.=--Malted barley, capable of converting not less than 5 times its weight of starch into sugars.

Yellowish grains with a characteristic odor and a sweet taste.

ACTION AND USES: Used to digest starch by its diastase.

_Extractum Malti (Ext. Malt.), Extract of Malt, U.S.P._--Syrupy liquid.

DOSAGE: 15 Gm. or 4 drachms (U.S.P.).

=Malvae Folia (Malv. Fol.), Mallow Leaves, N.F.=

ACTION AND USES: Demulcent "herb tea," without definite indications for its use.