TY  - JOUR
T1  - THe potency of digitalis standardized according to u. s. p. xi
AU  - Lewis L
Y1  - 1939/03/25
N1  - 10.1001/jama.1939.02800120066024
JO  - Journal of the American Medical Association
SP  - 1181
EP  - 1181
VL  - 112
IS  - 12
N2  - To the Editor:— 
    The confusion concerning digitalis standardization is illustrated by a comparison of the opinions of two eminent authorities printed within a period of three weeks in The Journal.On Dec. 17, 1938, in "The Treatment of Cardiac Irregularities," George Fahr (page 2269, footnote 5) states: "At present digitalis is standardized according to the U. S. P. XI so that 0.65 cc. of the tincture or 0.065 Gm. (1 grain) of the powdered leaf is 1 Hatcher-Brody cat unit. In the previous editions of the U. S. Pharmacopeia 1 cc. of tincture or 0.1 Gm. of the powdered leaf contained 1 cat unit. One-tenth gram (1 1/2 grains) of the standard U. S. P. XI powder is equivalent to 1.6 Hatcher-Brody cat unit."On January 7, in "Drug Therapy in Coronary Disease" Harry Gold (page 5) states: "A satisfactory dosage in the average case of auricular fibrillation or heart
SN  - 0002-9955
M3  - doi: 10.1001/jama.1939.02800120066024
UR  - http://dx.doi.org/10.1001/jama.1939.02800120066024
ER  -