Extractum Iridis, B.P.C. Extract of Iris.
Related entries: Blue Flag
Synonyms.—Iridin; Extractum Iridis Siccum.
|Blue Flag Rhizome, in No. 60 powder||100.00|||||20 ounces|
|Calcium Phosphate, a sufficient quantity.|
|Alcohol (60 per cent.), a sufficient quantity.|
Exhaust the drug by percolation with the alcohol, recover the alcohol by distillation, and evaporate the remaining liquid to dryness; reduce the residue to fine powder, add 5 per cent. of calcium phosphate, again dry, powder, and preserve in a well-stoppered bottle.
Dose.—½ to 2 decigrams (1 to 3 grains).