ACTION AND USES: Hydrastinine resembles hydrastine in its action but is said to be less depressing. Hydrastinine has a pronounced pressor effect on peripheral vessels, causing a rise of blood pressure. DOSAGE: 0.03 Gm. or 1/2 grain (U.S.P.) =*Hydrastis (Hydrastis), Hydrastis, U.S.P.= (Golden Seal).--Rhizome and roots, yielding not less than 2.5 per cent. of ether-soluble alkaloids, chiefly hydrastin. ACTION AND USES: Hydrastis is an unpleasant bitter; it possesses no advantages over other simple bitters (gentian). It has been asserted to have a special influence on mucous membranes favoring their nutrition and return to a normal condition. There is little or no experimental evidence to bear out the claim for any special action. DOSAGE: 2 Gm. or 30 grains (U.S.P.). _Extractum Hydrastis (Ext. Hydrast.), Extract of Hydrastis, U.S.P._ (Extract of Golden Seal, Powdered Extract of Hydrastis).--One Gm. extract represents about 4 Gm. hydrastis. Yields about 10 per cent. of alkaloids. DOSAGE: 0.5 Gm. or 8 grains (U.S.P.). _*Fluidextractum Hydrastis (Fldext. Hydrast.), Fluidextract of Hydrastis, U.S.P._--Hydrastis (100%), yielding about 2 per cent. of alkaloids. Absolute alcohol content about 55 per cent. DOSAGE: 2 Cc. or 30 minims (U.S.P.). _Glyceritum Hydrastis (Glycer. Hydrast.), Glycerite of Hydrastis, U.S.P._ (Glycerite of Golden Seal).--Hydrastis (100%) yielding not less than 1.245 per cent. of alkaloids. DOSAGE: 2 Cc. or 30 minims (U.S.P.). _Tinctura Hydrastis (Tr. Hydrast.), Tincture of Hydrastis, U.S.P._ (Tincture of Golden Seal).--Hydrastis (20%), yielding about 0.4 per cent. of hydrastin; in alcohol and water. Absolute alcohol content about 60 per cent. DOSAGE: 4 Cc. or 1 fluidrachm (U.S.P.) =*Hydrogenii Dioxidum, Hydrogen Dioxide= (Hydrogen Peroxide).--H{2}O{2}. _*Liquor Hydrogenii Dioxidi (Liq. Hydrog. Diox.), Solution of Hydrogen Dioxide, U.S.P._ (Aqua Hydrogenii Dioxidii, U.S.P. VIII, Solution of Hydrogen Peroxide).--H{2}O{2} (not less than 3%). ACTION AND USES: Nontoxic and fairly efficient local antiseptic and detergent, useful mainly for the destruction of pus. Used on suppurating wounds and as a mouthwash and gargle; also as a bleaching agent. Should not be injected into a wound unless free drainage is present. DOSAGE: 4 Cc. or 1 fluidrachm (U.S.P.). For external application should be diluted about 1:4. =Hyoscyaminae Hydrobromidum (Hyoscyamin. Hydrobr.), Hyoscyamine Hydrobromide, U.S.P.= (Hyoscyamine Bromide).--Obtained from hyoscyamus and other plants of the nightshade family. White, odorless crystals. Freely soluble in alcohol (1:2.5) and in chloroform (1:1.7); very soluble in water. ACTION AND USES: Similar to those of atropine; is usually more sedative to the brain, but at times produces acute delirium. The drug is very uncertain. DOSAGE: 0.3 mg. or 1/200 grain (U.S.P.).