Antitussive

A substance that inhibits coughing, either by lessening the irritability of the respiratory nerves or center, or by aiding in the removal of irritating substances from the air passages.

See

Lobelia	Wild Cherry Bark
Thyme	Horehound

References
Culbreth, D.M.R. A Manual of Materia Medica and Pharmacology. Reprinted by Eclectic Med Publications: Portland, OR, 1983.

Moore, M. Medicinal Plants of the Mountain West. Museum of New Mexico Press, Santa Fe, NM. l984.

Hyde, F.F. British Herbal Pharmacopoeia. British Herbal Medicine Assoc: West Yorks, England, 1983.