Quassia

(kwosh’ ’-e-ah ) [after Qua i, a negro slave who first used it]. The wood of several trees of the order Simarubeae. Q. of the U. S. P. and B. P. is the wood of Picrsena excels a, and contains the bitter principle, qua in, C32H44O]0. Q. is a simple bitter, and is used in dyspepsia and constipation; in the form of an enema it is employed against seat worms. Preparations: Extractum qua iae (U. S. P., B. P.), dose gr. j-iij (o. 065-0. 2). Extractum qua iae fluidum (U. S. P.), dose f.^ -j (2.0-4.0). Infusum qua iae (B. P.), dose f^ij (64.0). Tinctura qua iae (U. S. P.) dose, fgj (4.0). Qua in, dose gr. y1^ (0.006). 541