ACTION AND USES: Has been used externally in the form of an ointment for application to glandular enlargement and for chronic joint enlargement. Its use is irrational. _Unguentum Plumbi Iodidi (Ung. Plumb. Iod.), Ointment of Lead Iodide, N.F._--Lead iodide (10%), and benzoinated lard. =Plumbi Oxidum (Plumb. Oxid.), Lead Oxide, U.S.P.= (Litharge).--PbO. Heavy yellowish or reddish-yellow, odorless and tasteless powder or minute scales. Almost insoluble in water; insoluble in alcohol. ACTION AND USES: Used to make pharmaceutical preparations. _Emplastrum Plumbi (Emp. Plumb.), Lead Plaster, U.S.P._ (Diachylon Plaster).--Lead oleate obtained by heating a mixture of lead oxide, olive oil and lard. USES: Used in plaster masses and as a basis for diachylon ointment. _Unguentum Diachylon (Ung. Diachyl.), Diachylon Ointment, U.S.P._--Lead plaster (50%), oil of lavender and white petrolatum. =Plumbi Oxidum Rubrum (Plumb. Oxid. Rub.), Red Oxide of Lead, N.F.= (Red Lead).--Chiefly Pb{3}O{4}. Heavy, odorless, tasteless red powder. Almost insoluble in water; insoluble in alcohol. ACTION AND USES: Similar to those of =Plumbi Carbonas=. =Plumbi Subacetas, Lead Subacetate.= ACTION AND USES: Astringent; used externally in the form of the following preparations: _Ceratum Plumbi Subacetatis (Cerat. Plumb. Subacet.), Cerate of Lead Subacetate, N.F._ (Goulard's Cerate).--A mixture of solution of lead subacetate (20%), camphor (2%), wool fat, white wax, and white petrolatum. _*Liquor Plumbi Subacetatis (Liq. Plumb. Subacet.), Solution of Lead Subacetate, U.S.P._ (Goulard's Extract).--Contains lead subacetate corresponding to about 18 per cent. of lead, Pb. _Liquor Plumbi Subacetatis Dilutus (Liq. Plumb. Subacet. Dil.), Diluted Solution of Lead Subacetate, U.S.P._ (Lead Water).--Solution of lead subacetate (4%) with water. =*Podophyllum (Podoph.), Podophyllum, U.S.P.= (Mandrake, May Apple Rhizome).--Yields not less than 3 per cent. of resin. ACTION AND USES: See the resin, below. _Extractum Podophyllum (Ext. Podophyl.), Extract of Podophyllum, N.F._--A hydro-alcoholic extract. DOSAGE: 0.015 Gm. or 1/4 grain (N.F.). _Fluidextractum Podophylli (Fldext. Podophyll.), Fluidextract of Podophyllum, U.S.P._--Podophyllum (100%). Absolute alcohol content about 80 per cent. DOSAGE: 0.5 Cc. or 8 minims (U.S.P.). _*Resina Podophylli (Res. Podoph.), Resin of Podophyllum, U.S.P._ (Podophyllin).--The resin from podophyllum. USES: Slow but effective and rather irritant cathartic. DOSAGE: 0.01 Gm. or 1/6 grain (U.S.P.). =Populi Gemmae (Pop. Gem.), Balsam Poplar Buds, N.F.= (Balm of Gilead Buds). ACTION AND USES: Similar to but without advantage over cubeb or turpentine. Used almost exclusively in proprietary medicines and imitations. =Potassae Chlorinata, Chlorinated Potassa.=