Methylthioninae Chloridum (Methylthionin. Chlor.), Methylthionine Chloride, U.S.P. (Methylthioninae Hydrochloridum, U.S.P. VIII, Methylene Blue).

Dark green powder or crystals with a bronze-like luster. Freely soluble in water and alcohol, forming a deep blue solution.

Action and Uses: Sometimes used as urinary antiseptic; also in the treatment of malaria and some neuralgic conditions. In the latter use, is of doubtful value.

Dosage: 0.15 Gm. or 2-1/2 grains (U.S.P.).

Mezereum (Mezereum), Mezereum, U.S.P. (Mezereon).—A bark.

Action and Uses: Antiquated antisyphilitic and vesicant.

Fluidextractum Mezerei (Fldext. Mezer.), Fluidextract of Mezereum, N.F.—Mezereum (100%). Absolute alcohol content about 70 per cent.

MISTURAE, MIXTURES.—Liquid preparations containing insoluble or partly soluble medicinal substances suspended in them.

For the various official mixtures, see under the names of the respective principal ingredients. For Mistura Adstringens, see under Cupri Sulphas; for Mistura Camphorae Acida, Mistura Carminativa and Mistura Glycyrrhizae Composita, under Opium; for Mistura Ferri Composita, under Ferri Carbonas; for Mistura Camphorae Aromatica and Mistura Oleo-Balsamica, under Oleum Lavandulae; for Mistura Pectoralis Stokes, under Ammonii Carbonas.