Tinctura Catechu. Lond. Dub. Tincture of Catechu

"Take of catechu, three ounces and a half; cinnamon, bruised, two ounces and a half; proof spirit, two pints. Macerate for fourteen days (seven days, Dub.), and filter."

Tinctura Catechu Acaciae, Edin. Tincture of Catechu.

"Take of extract of catechu in powder, three ounces; cinnamon bark, bruised, two ounces; proof spirit, two pounds and a half. Digest for seven days, and filter through paper."

Syn. Teinture de Cachou (.F.), Katechutinktur (G.).

Proof spirit dissolves all the soluble parts of catechu, except the mucilage, which in iij. ss. of Bengal catechu amounts to 110 grains; besides which 84 grains of impurities remain undissolved. The tincture is a solution of tannin, extractive, and the volatile oil of cinnamon. It is a grateful, warm astringent, useful in all cases in which astringents are indicated. The dose is from f 3 j. to f 3 iij.

Tincturae Cinchonae. Lond. Tincture of Cin-chona

"Take of heart-leaved cinchona bark, in powder, eight ounces; proof spirit, two pints. Macerate for fourteen days, and filter."

Tinctura Cinchonae Lancifoliae, Edin. Tinctura Cinchonae, Dub. Tincture of lance-leaved Cinchona.

"Take of cinchona bark in powder, four ounces; proof spirit, two pounds and a half (two pints, Dub.) Digest for seven days, and filter through paper."

Syn. Teinture de Quinquina (F.), Chinatinktur (G.), Tintura di China (I.).

Although this tincture contains the active principles of cinchona bark in considerable quantity, yet from the nature of the vehicle it cannot be given in sufficiently large doses to produce the beneficial effects of the bark in substance; it is therefore used chiefly as an adjunct to the infusion or decoction. The dose is from f 3 j. to f 3 iv.

Tincturae Cinchonae Ammoniata, Edin. Ammoniated Tincture of Bark. "Take of lance-leaved cinchona bark, powdered, four ounces; aromatic spirit of ammonia, two pints. Macerate for ten days, and filter."

1 Tinctura Japonica, P. L. 1745.

2 Tinctura corticis Peruviana; simplex, P. L. 1745.

This is the formula of 1787, which was rejected in 1809. It is said to be useful in dyspeptic complaints attended with much acidity; but little of its utility is due to the cinchona bark.

Tinctura Cinchonae Composita. Lond. Edin. Dub. Compound Tincture of Cinchona

"Take of lance-leaved cinchona, powdered, four ounces; orange-peel, three ounces (half an ounce, Dub.); Virginian snake-root, bruised, six drachms; saffron, two drachms; cochineal, in powder, a drachm; proof spirit, two pints. Macerate for fourteen (seven, Edin.) days, and filter."

Syn. Zusammengesetzte Chinatinktur (G.).

This tincture is more grateful than the former; and although it contains less cinchona, yet the addition of the other ingredients renders it more useful both as a stomachic and a tonic. It is the same as the celebrated Tincture of Huxham1, who generally gave it in intermittents, and low nervous fevers, in diluted wine or any proper vehicle, with ten or fifteen drops of elixir of vitriol (aromatic sulphuric acid, Edin.). The dose is from f 3 j. to f 3 iij. or more.