_Tinctura Guaiaci Composita (Tr. Guaiac. Co.), Compound Tincture of Guaiac, N.F._ (Dewees' Tincture of Guaiac).--Guaiac (12.5%), potassium carbonate and pimenta in diluted alcohol. Absolute alcohol content about 45 per cent. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.) =Guarana (Guarana), Guarana, U.S.P.=--Paste consisting chiefly of crushed seeds yielding not less than 4 per cent. of caffeine. ACTION AND USES: Used for its caffeine. There is no reason for using it instead of caffeine. DOSAGE: 2 Gm. or 30 grains (U.S.P.). _Elixir Guaranae (Elix. Guar.), Elixir of Guarana, N.F._--Fluidextract of guarana (20%), compound elixir of taraxacum (60%) and aromatic elixir. Absolute alcohol content about 34 per cent. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). _Fluidextractum Guaranae (Fldext. Guaran.), Fluidextract of Guarana, U.S.P._--Guarana (100%) yielding about 4 per cent. of caffeine. Absolute alcohol content about 60 per cent. DOSAGE: 2 Cc. or 30 minims (U.S.P.) =Gutta Percha (Gutta Percha), Gutta Percha, N.F.=--A purified, coagulated tree sap. ACTION AND USES: Used for technical purposes in dentistry. _Liquor Guttae Perchae (Liq. Gut. Perch.), Solution of Gutta Percha, N.F._--A clarified solution of gutta percha in chloroform. =Haematoxylon (Haematox.), Hematoxylon, N.F.= (Logwood). ACTION AND USES: Intestinal astringent, without advantage over krameria, etc. _Extractum Haematoxyli (Ext. Haematox.), Extract of Hematoxylon, N.F._--An aqueous extract. DOSAGE: 1 Gm. or 15 grains (U.S.P.) =Hamamelidis Folia (Hamamel. Fol.), Hamamelis Leaves, N.F.= (Witch Hazel Leaves). ACTION AND USES: Astringent, without advantage over other tannin-bearing drugs (krameria, etc.). DOSAGE: 2 Gm. or 30 grains (N.F.). _Fluidextractum Hamamelidis Foliorum (Fldext. Hamamel. Fol.), Fluidextract of Hamamelis Leaves, N.F._--Hamamelis leaves (100%). Absolute alcohol content about 25 per cent. DOSAGE: 2 Cc. or 30 minims (N.F.) =Hamamelis= (Witch Hazel). _Aqua Hamamelidis (Aq. Hamam.), Hamamelis Water, U.S.P._ (Witch Hazel Water, Distilled Extract of Witch Hazel).--Witch hazel bark, twigs, smaller stems or entire shrub, distilled with water and preserved with about 14 per cent. of alcohol. USES: Employed externally, for contusions. It owes its feeble activity mainly to the alcohol =Helianthemum (Helianth.), Helianthemum, N.F.= (Rock-Rose, Frost-Weed).--The dried herb. ACTION AND USES: Obsolete astringent, tonic, alterative and emetic; unreliable and without established value. DOSAGE: 4 Gm. or 1 drachm (N.F.). _Fluidextractum Helianthemi (Fldext. Helianth.), Fluidextract of Helianthemum, N.F._--Helianthemum (100%). Absolute alcohol content about 40 per cent. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.) =Helonias (Helon.), Helonias, N.F.= (False Unicorn).--Rhizome and roots. ACTION AND USES: Ingredient of "female remedies"; without established value. DOSAGE: 2 Gm. or 30 grains (N.F.).