Extract of Male Fern

Syn. Alcoholic extract of male fern ; Extractum filicis, B. P. Prep. 1. (Dr Ebers.) From the tincture of the dried root of male fern ( Lastræa Filix-mas ), made with rectified spirit. In tape-worm.— Dose , 20 gr. to 1 ⁄ 2 dr., twice a day, made into an electuary with powdered sugar, and followed by a strong dose of castor oil. 2. (Ethereal.) B. P. ( Extractum filicis liquidum. ) Fern root, in coarse powder, 1; ether, 2 1 ⁄ 2 , or a sufficiency. Pack closely in a percolator with 1 of the ether, add the rest at intervals, until it pa es through colourle , distil off the ether, and the liquid extract remains.— Dose , 30 to 60 minims. See Oil of Male Fern .