=INFUSA, INFUSIONS.=--Aqueous preparations made by pouring hot or cold water over a vegetable drug, allowing the mixture to stand for a definite period and then straining. For the official infusions, see under the names of the respective drugs. =Inula (Inula), Inula, N.F.= (Elecampane).--Rhizome and roots. ACTION AND USES: At one time used in bronchitis. No scientific indications for its use. DOSAGE: 2 Gm. or 30 grains (N.F.). =INUNCTA, INUNCTIONS.=--Semisolid ointment-like preparations used for external application. For the various inunctions see under the names of the principal ingredients. =*Iodoformum (Iodof.), Iodoform, U.S.P.=--Triiodomethane, CHI{3}. Lemon-yellow powder or lustrous crystals, with a peculiar, penetrating odor and an unpleasant, slightly sweetish taste suggestive of iodine. Nearly insoluble in water, to which, however, it imparts its odor and taste; soluble in alcohol (1:60) and in glycerin (1:80). ACTION AND USES: Used as dusting powder, promoting healing by granulation. Oily suspensions are also used in treatment of tuberculous fistulas. _Collodium Iodoformi (Collod. Iodof.), Iodoform Collodion, N.F._--Iodoform (5%) in flexible collodion. USES: There appears to be no advantage in applying iodoform in collodion. _Glycerogelatinum Iodoformi (Glycerogel. Iodof.), Iodoform Glycerogelatin, N.F._--Iodoform (10%), water, glycerin and glycerinated gelatin. _Iodoformum Aromatisatum (Iodof. Arom.), Aromatized Iodoform, N.F._--Coumarin (4%) and iodoform. _Petroxolinum Iodoformi (Petrox. Iodof.), Iodoform Petroxolin, N.F._ (Iodoform Petrox.).--An unstable preparation made from iodoform (3%), acetone, oleic acid, eucalyptol and liquid petroxolin. _Unguentum Iodoformi (Ung. Iodof.), Iodoform Ointment, U.S.P._--Iodoform (10%) in benzoinated lard. =*Iodum (Iodum), Iodine, U.S.P.=--I. Heavy, bluish-black, brittle plates, with a metallic luster, a distinctive odor and a sharp, acrid taste. Very slightly soluble in water (1:2950) and soluble in alcohol (1:12.5). Freely soluble in solutions of alkali iodides. ACTION AND USES: The tincture and compound solution are used externally as local irritant and antiseptic. The irritant action can be easily graduated by successive application. It is rarely used internally for the systemic effects of iodides. DOSAGE: 0.005 Gm. or 1/12 grain (U.S.P.), largely diluted. _Collodium Iodi (Collod. Iodi), Iodine Collodion, N.F._--Iodine (5%) in flexible collodion. USES: There appears little advantage in applying iodine in collodion. _Liquor Iodi Compositus (Liq. Iodi Co.), Compound Solution of Iodine, U.S.P._ (Lugol's Solution).--Iodine (5%) and potassium iodide (10%) in water. DOSAGE: 0.2 Cc. or 3 minims (U.S.P.).