USES: Used to form a protective film and as a vehicle for external applications. _*Collodium Flexile (Collod. Flex.), Flexible Collodion, U.S.P._--A mixture of collodion (95%) with camphor (2%) and castor oil (3%). USES: More pliable than collodion and does not contract as much in drying. =Quassia (Quass.), Quassia, U.S.P.= (Bitter Wood). ACTION AND USES: Simple bitter stomachic (more disagreeable than gentian); an infusion is also used as enema in the treatment of pinworms. DOSAGE: 0.5 Gm. or 8 grains (U.S.P.). _Extractum Quassiae (Ext. Quas.), Extract of Quassia, N.F._ (Powdered Extract of Quassia).--An aqueous extract diluted with starch, 1 Gm. representing 10 Gm. of quassia. DOSAGE: 0.06 Gm. or 1 grain (N.F.). _Fluidextractum Quassiae (Fldext. Quass.), Fluidextract of Quassia, N.F._--Quassia (100%). Absolute alcohol content about 25 per cent. DOSAGE: 0.5 Cc. or 8 minims (N.F.). _Tinctura Quassiae (Tr. Quas.), Tincture of Quassia, U.S.P._--Quassia (20%) in alcohol and water. Absolute alcohol content about 30 per cent. DOSAGE: 2 Cc. or 30 minims (U.S.P.). =Quercus (Querc.), Quercus, N.F.= (White Oak Bark). ACTION AND USES: Tannin-bearing astringent, without advantage over krameria, etc. DOSAGE: 1 Gm. or 15 grains (N.F.). _Fluidextractum Quercus (Fldext. Querc.), Fluidextract of Quercus, N.F._--Quercus (100%). Absolute alcohol content about 40 per cent. DOSAGE: 1 Cc. or 15 minims (N.F.). =Quillaja (Quillaja), Quillaja, N.F.= (Soap-tree Bark). ACTION AND USES: Contains saponin and has been recommended as an expectorant. Similar to, but without advantage over senega. Has been used as a detergent and as an emulsifying agent; in the latter use is objectionable. _Tinctura Quillajae (Tr. Quillaj.), Tincture of Quillaja, N.F._--Quillaja (20%) in alcohol and water. Absolute alcohol content about 30 per cent. =Quinidina (Quinid.), Quinidine, N.F.=--An alkaloid isomeric with quinine. White, odorless crystals or powder, with an intense and persistent bitter taste. ACTION AND USES: At one time recommended as a cheap substitute for quinine. Inferior and obsolete. DOSAGE: Tonic, 0.1 Gm. or 1-1/2 grains (N.F.); antimalarial, 1 Gm. or 15 grains (N.F.) daily. _Syrupus Quinidinae (Syr. Quinid.), Syrup of Quinidine, N.F._ (Bitterless Syrup of Quinidine).--Quinidine (3.3%) and oil of orange in syrup. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). =*Quinina (Quin.), Quinine, U.S.P.=--Obtained from cinchona bark. White, odorless, intensely bitter powder. Very slightly soluble in water (1:1560), and very soluble in alcohol (1:0.8). ACTION AND USES: Bitter tonic, analgesic and antipyretic; specific against malaria. Contraindicated in ear diseases. Idiosyncrasies are common. The official quinine salts are more numerous than is necessary. Those that are starred would meet every indication.