_Elixir Buchu (Elix. Buchu), Elixir of Buchu, N.F._--Fluidextract of buchu (12.5%) in alcohol and aromatic elixir. Absolute alcohol content about 35 per cent. DOSAGE: 4 Cc. or 1 fluidrachm. _Elixir Buchu Compositum (Elix. Buchu Co.), Compound Elixir of Buchu, N.F._--Compound fluidextract of buchu (25%) in aromatic elixir. Absolute alcohol content about 30 per cent. DOSAGE: 4 Cc. or 1 fluidrachm. _Elixir Buchu et Potassii Acetatis (Elix. Buchu et Pot. Acet.), Elixir of Buchu and Potassium Acetate, N.F._--Potassium acetate (8.5%) and elixir of buchu. Absolute alcohol content about 30 per cent. DOSAGE: 4 Cc. or 1 fluidrachm. _Fluidextractum Buchu (Fldext. Buchu), Fluidextract of Buchu, U.S.P._--Buchu (100%). Absolute alcohol content about 80 per cent. DOSAGE: 2 Cc. or 30 minims (U.S.P.). _Fluidextractum Buchu Compositum (Fldext. Buchu Co.), Compound Fluidextract of Buchu, N.F._--Buchu (62.5%), cubeb, juniper and uva ursi (each 12.5%). Absolute alcohol content about 55 per cent. USES: A needlessly complex diuretic mixture. DOSAGE: 2 Cc. or 30 minims (N.F.). =Cacao Praeparata (Cacao Praep.), Cocoa, N.F.= (Prepared Cacao, Soluble Cocoa). ACTION AND USES: Beverage and flavor =Cactus Grandiflorus (Cact. Grand.), Cactus Grandiflorus, N.F.= (Night Blooming Cereus).--Fresh stems. ACTION AND USES: Used in neurotic heart disturbances; results probably imaginary. Drug apparently inactive. _Tinctura Cacti Grandiflori (Tr. Cact. Grand.), Tincture of Cactus Grandiflorus, N.F._--Cactus grandiflorus (50%) in alcohol. Absolute alcohol content about 65 per cent. DOSAGE: 1 Cc. or 15 minims (N.F.). =*Caffeina (Caffein.), Caffeine, U.S.P.= (Theine).--An alkaloid obtained from coffee or tea. White, silky, efflorescent needles, odorless and bitter. Soluble in water (1:46) and in alcohol (1:66). ACTION AND USES: Diuretic; cardiac, respiratory and psychic stimulant. Used as a nerve stimulant in poisoning by narcotic drugs and for the relief of headache. Widely used to combat the circulatory depression of the acute infectious diseases but its value in such conditions is uncertain. As a diuretic probably inferior to theobromine. DOSAGE: 0.15 Gm. or 2-1/2 grains (U.S.P.), in capsules. _Caffeina Citrata (Caffein Cit.), Citrated Caffeine, U.S.P._--Caffeine and citric acid equal parts. White, odorless powder, with a slightly bitter, acid taste. DOSAGE: 0.3 Gm. or 5 grains (U.S.P.), in solution or capsules. _Caffeina Citrata Effervescens (Caff. Cit. Eff.), Effervescent Citrated Caffeine, U.S.P._--Contains anhydrous caffeine (about 2%), with sodium tartrate and citrate. DOSAGE: 4 Gm. or 1 drachm (U.S.P.) in water. =*Caffeinae Sodio-Benzoas (Caff. Sod. Benz.), Caffeine Sodio-Benzoate, U.S.P.=--Caffeine and sodium benzoate about equal parts.