Blennorrhetics are medical substances which increase the secretion of the mucous membranes, and are employed in morbid conditions of such membranes, in order to restore them to healthy action, in cases where their secretion is deficient, excessive or abnormal in quality. They are termed expectorants when used to stimulate the secretion of mucus from the bronchial or laryngeal membranes, as in bronchitis and laryngitis, and during convalescence, in pneumonia. The oleo-resinous agents of this class are employed in chronic diarrhoea, and the diarrhoea of typhoid fever, such as oil of turpentine, for example; also in diseases of the urino-genital mucous membranes, such as gonorrhea, gleet, leucorrhea, incontinence of urine, cystitis, etc., etc. Included in the class of blennorrhetics are such agents as senna, cimicifuga, garlic, turpentine, squill, copaiba, cubebs, matico, buchu, myrrh, benzoin, storax, balsam of peru, balsam of tolu, etc., etc.