=TROCHISCI, TROCHES= (Lozenges).--Tablets intended to be dissolved in the mouth for their local effect on the mucous membrane of the mouth and the throat. For the official troches see under the names of the principal ingredients. =Ulmus (Ulmus), Elm, U.S.P.= (Elm Bark, Slippery Elm).--The inner bark. ACTION AND USES: Obsolete demulcent. _Trochisci Ulmi (Troch. Ulmi), Troches of Elm, N.F._--Each troche contains elm, tragacanth, sugar and methyl salicylate. USES: Demulcent expectorant. DOSAGE: 1 troche (N.F.). =UNGUENTA, OINTMENTS.=--Soft, fatty solids, of such consistency that they are readily spread at ordinary temperatures. For the official ointments, see under the names of the respective principal constituents. For Unguentum, see under =Adeps=; for Unguentum Diachylon, under =Plumbi Oxidum=, and for Unguentum Fuscum, under =Camphora=. =Uranii Nitras (Uran. Nit.), Uranium Nitrate, U.S.P.= (Uranyl Nitrate).--UO{2}(NO{3}){2} + 6H{2}O. Light, yellow, odorless, somewhat efflorescent, radioactive crystals, having a bitter astringent taste. Freely soluble in water (1:1.2); also soluble in alcohol or ether. ACTION AND USES: Has been used, without adequate justification, in the treatment of diabetes and cancer. Solutions are poisonous and produce glucosuria when injected subcutaneously, even in small doses. DOSAGE: 0.01 Gm. or 1/6 grain (U.S.P.), best administered in simple solutions. Use with caution. =Uva Ursi (Uva Ursi), Uva Ursi, U.S.P.= (Bearberry).--Leaves. ACTION AND USES: Mild and slightly antiseptic diuretic used especially in vesical catarrh. Less effective than santal oil. DOSAGE: 2 Gm. or 30 grains (U.S.P.). _Fluidextractum Uvae Ursi (Fldext. Uvae Ursi), Fluidextract of Uva Ursi, U.S.P._--Uva ursi (100%). Absolute alcohol content about 25 per cent. DOSAGE: 2 Cc. or 30 minims (U.S.P.). =*Valeriana (Valer.), Valerian, U.S.P.=--Rhizome and roots. ACTION AND USES: Used as "antispasmodic" and "nerve sedative" in hysteria and other nervous excitations. Its influence is largely psychic, owing to its strong, persistent odor. DOSAGE: 2 Gm. or 30 grains (U.S.P.). _Fluidextractum Valerianae (Fldext. Valer.), Fluidextract of Valerian, N.F._--Valerian (100%). Absolute alcohol content about 70 per cent. DOSAGE: 2 Cc. or 30 minims (N.F.). _Tinctura Valerianae (Tr. Valer.), Tincture of Valerian, U.S.P._--Valerian (20%), in alcohol and water. Absolute alcohol content about 69 per cent. DOSAGE: 4 Cc. or 1 fluidrachm (U.S.P.). _*Tinctura Valerianae Ammoniata (Tr. Valer. Ammon.), Ammoniated Tincture of Valerian, U.S.P._--Valerian (20%) in aromatic spirit of ammonia. Absolute alcohol content about 64 per cent. DOSAGE: 2 Cc. or 30 minims (U.S.P.). =Vanilla (Vanilla), Vanilla, N.F.= (Vanilla Bean).--Cured fruit. ACTION AND USES: Flavoring.