Hydrobromate of Homatropine. C16H21N03, HBr.

Homatropine is an alkaloid obtained by Prof. Ladenburg by action of hydrochlorates on tropine amygdalate (phenyl) or benzo glycolic acid. White crystalline flakes, soluble in 6 parts of cold water; much weaker than Atropine.

ThekapeUtics. The hydrochlorate is used in eye practice. In solution of 2 to 6 grains to the ounce, it widens the pupil of the eye and paralyses the ciliary muscle, the pupil of the eye losing the power of contraction and dilation; this disappears in a few hours, constitutionally disturbing less than atropine or duboisine. Dose, 1/80 to 1/20 grain. Homatropine sulphate, hydrochlorate, and salicylate are similarly employed.