=Bitters, Simple.=—Medicines which have a bitter taste and have the power of stimulating the gastro-intestinal mucous membrane, without affecting the general system. =Blisters.=—Medicines which when locally applied cause inflammatory exudation of serum from the skin, and are used as revulsants. =Calefacients.=—Medicines used externally to cause a sense of warmth. =Cardiac Depressants.=—Medicines used to lower the heart’s action. =Cardiac Stimulants.=—Medicines used to increase the heart’s action. =Carminatives.=—Medicines containing a volatile oil used to excite intestinal peristalsis and provoke an expulsion of flatus. =Cathartics.=—Purgatives. =Caustics.=—Medicines used to destroy living tissues. =Cholagogues.=—Medicines which provoke a flow of bile. =Constringents.=—Astringents. =Convulsants.=—Medicines which cause convulsions. =Correctives.=—Medicines used to correct or render more pleasant the action of other remedies, especially purgatives. =Corrigents.=—Correctives. =Demulcents.=—Mucilaginous principles which are used in solution to soothe and protect irritated mucous membranes and other tissues. =Deobstruents= (obsolete and not very definite).—Medicines which overcome obstruction; aperients. =Deodorants.=—Substances which destroy or hide foul air. =Depilatories.=—Substances used to remove hair. =Depressants.=—Sedatives. =Depressomotors.=—Medicines which lessen motor activity. =Depurants.=—Medicines which act upon the emunctories so as to cause excretion and thereby purify the system. =Detergents.=—Medicines which cleanse wounds, ulcers, etc. =Diaphoretics.=—Medicines which produce sweating. =Digestants.=—Ferments and acids which have the power of aiding in the solution of food. =Diluents.=—Medicines which dilute secretions and excretions. =Disinfectants.=—Substances which have the power of destroying disease germs or the noxious properties of decaying organic matter. =Diuretics.=—Medicines which increase the secretion of urine. =Drastics.=—Purgatives which cause much irritation.