Pyrethrum

(pi-re' -thrum). Pellitory. The dried root of An a cyclus P. It contains a resin, a volatile oil, and sugar. When taken into the mouth, it increases the flow of saliva, and is used as a masticator in dry conditions of the mouth, in relaxed states of the throat, and in aphonia; also in headache and facial neuralgia. It is valuable mainly as a masticatory and sialagogue. Dose 3 — j. P., Tinct., 20 per cent, strong used externally. Dose of the British tincture P. roseum, Persian Pellitory. The powdered flower-heads are used as an insecticide. See Buhach .