Extractum Hyoscyami Exsiccatum, B.P.C. Dried Extract of Hyoscyamus.
Related entries: Hyoscyamus
Synonyms.—Extractum Hyoscyami Foliorum Exsiccatum; Dried Extract of Hyoscyamus Leaves.
|Hyoscyamus Leaves and Flowering Tops, in No. 20 powder||100.00|||||20 ounces|
|Alcohol (70 per cent.)||400.00|||||80 fl. ounces|
Exhaust the drug by repercolation with the alcohol. Assay the tincture thus obtained, recover the alcohol from the remainder by distillation, and dry the residue in a tared dish, first over a water-bath and finally in a hot air oven at a temperature between 60° and 70°, until the weight is fairly constant. Calculate the percentage of alkaloid in the dry extract, and incorporate with the latter a sufficient quantity of a standard powder of the leaves to produce an extract containing 0.2 per cent. of alkaloid. Triturate until thoroughly mixed, pass through a No. 20 sieve, and transfer to a well-stoppered bottle. Dried extract of hyoscyamus leaves is an improvement upon the official green extract. It is constant in strength, and being in the form of powder is more convenient for dispensing. Dried extract of hyoscyamus leaves should he kept in a cool, dry place.
Dose.—1 to 3 decigrams (2 to 5 grains).