The acetate of ammonia in 1 to 2-dr. doses will often relieve sick-headache. The chloride, in 10 to 20-gr. doses, is indicated in bilious and nervous forms occurring in the young, and in delicate over-worked women, - "it stimulates the sensory nerves, and regulates the vaso-motors" (Anstie: Practitioner, vol. i.).

In headache connected with menorrhagia it is said to be more useful than in that connected with irregular or suppressed menstruation (Baral-lier: Bulletin de Therapeutique, 1859).