A companion to the United States pharmacopia; . ized white paper is slowlypassed through the liquid, and then hung up to dry. Lobelia; U. S. Ilerba—Indian Tobacco. Origin.—Lobelia inflata, Linn6 (Lobeliacem). Habitat.—North America. Parts used.—The official drug consists of the leaves and tops, col-lected after the seed-capsules have become inflated. Description.—See Fig. 355. The herb is pale green, has a slightodor, and a burning tobacco-like taste when chewed. The powder isvery irritating to the air-passages. Constituents.—The alkaloid lobeline is doubtless the active con-st
A companion to the United States pharmacopia; . ized white paper is slowlypassed through the liquid, and then hung up to dry. Lobelia; U. S. Ilerba—Indian Tobacco. Origin.—Lobelia inflata, Linn6 (Lobeliacem). Habitat.—North America. Parts used.—The official drug consists of the leaves and tops, col-lected after the seed-capsules have become inflated. Description.—See Fig. 355. The herb is pale green, has a slightodor, and a burning tobacco-like taste when chewed. The powder isvery irritating to the air-passages. Constituents.—The alkaloid lobeline is doubtless the active con-stituent. In the drug it is combined with lobelic acid. It is a lightyellow, oily liquid, having a somewhat aromatic odor and a burning, UNITED STATES PHARMACOPOEIA. 659 acrid, tobacco-like taste ; soluble in alcohol and in ether. Its salts crys-tallize, and are soluble in water. In the seeds there is also about thirtyper cent, of a drying fixed oil. The eclectic lobelin is not the alkaloid, but in the nature of a pow- dered Figs. 359-362.—Lobelia Inflata, natural size ; flower, seed, and longitudinal section of seed, enlarged. Properties.—It is sialagogue, expectorant, emetic, narcotic, purga-tive ; in large doses, powerfully depressant. Its most valuable use is in asthma. Dose.—As an emetic, to gram (8 to 20 grains) ; or, as anexpectorant, in much smaller doses. 660 A COMPANION TO THE LOBELLE ACETUM; U. of Lobelia. One (1) part by weight of lobelia herb, in No. 30 powder, will maketen (10) parts by weight of the preparation, which is made by percola-tion, using a conical glass percolator, and using five (5) parts of themenstruum—diluted acetic acid—to moisten the drug before packing it. [The vinegar of lobelia obtained from one avoirdupi>is ounce of thedrug will measure very nearly ten fluidounces.] In the previous edition of the U. S. Pharmacopoeia (1870) the vine-gar of lobelia was made about one-fifth stronger = one troyou
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