. The dried root of Chondrodendron tomentosum, Brazil.

Characters. - Generally seen in more or less cylindrical pieces, about 3/4 inch to 2 inches in diameter and 4 inches or more in length. The bark is greyish-brown, and the wood greyish-yellow. It is recognised by the well-marked rings and medullary rays on the wood. The rings are irregularly concentric.

Composition. - It contains an alkaloid pelosine or buxine, which appears to be identical with beberine.

Preparations

B.P.

Dose.

Decoctum Pareirae......................................

1 1/2 ounce to pint.............

l 1/2-2 fl. oz.

Extractum ,, .......................................

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

10-20 gr.

,, ,, Liquidum....................

1 oz. to 1 fl. oz. ................

1/2-2 fl. dr.

U.S.P.

Extractum Pareirae Fluidum.........................

................ 1-2 fl. dr.

(3.75-7.50 c.c.)

Physiological Action and Uses. - Pareira is a bitter tonic, but is chiefly employed as a stimulant to the mucous membrane of the genito-urinary tract, in chronic catarrh of the bladder. It is usually given in the form of decoction or liquid extract, frequently combined with an acid or an alkali, according to the condition of the urine.