The dried bark of the stem and branches of cultivated plants of Cinchona succirubra.

Fig. 202.   Red Cinchona, half the natural size.

Fig. 202. - Red Cinchona, half the natural size.

Characters. - In quills or incurved pieces, coated with the periderm, outer surface brown or reddish-brown, rough, fissured or warty; inner surface redder; fractured surface often approaching to brick-red; transverse fracture finely fibrous; powder red-brown; taste bitter and astringent.

Adulteration. - Some of the brown and red inferior barks are occasionally substituted.

Test. - When used for purposes other than that of obtaining the alkaloids or their salts, it should yield between five and six per cent. of total alkaloids, of which not less than half shall consist of quinine and cinchonidine.

Preparations.

B.P.

Strength.

Dose.

Decoctum cinchonae ..............................................

27 1/2 gr. to 1 fl. oz.

1-2 fl. oz.

Extractum Cinchonae Liquidum......

about 1 oz. to 1 fl. oz.

5-10 min.

Infusum Cinchonae Acidum....................................

22 gr. to 1 fl. oz.

1-2 fl. oz.

Mistura Ferri Aromatica........................................

1 oz. to 16 fl. oz.

1-2 fl. oz.

Tinctura Cinchonae ................................................

88 gr. to 1 fl. oz.

1/2-2 fl. dr.

,, ,, Composita..............................

2 oz. to 1 pint.

1/2-2 fl. dr.

U.S.P.

Tinctura Cinchonae Composita..........................

.............................

1-4 fl. dr. (4-16 c.c.)

B.P. Tinctura Cinchonae Composita. Compound Tincture of Cinchona. Red cinchona bark, 2 oz.; bitter orange peel, 1 oz.; serpentary, 1/2 oz.; saffron, 55 gr.; cochineal, 30 gr.; proof spirit, 1 pint.