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880. Drastics Drastics are violent purgatives, such as gamboge, &c. 881. Emetics Emetics produce vomiting, or the discharge of the contents of the stomach, such as mustard and hot water, tartar-emetic, ipecacuanha, sulphate of zinc, and sulphate of copper. 882. Emmenagogues Emmenagogues are medicines which exercise a direct action on the uterus or womb, provoking the natural periodical secretion, such as castor, asafoetida, galbanum, iron, mercury, aloes, hellebore, savine, ergot of rye, juniper, and pennyroyal. 883. Emollients Emollients are remedies used externally to soften the parts they are applied to, such as spermaceti, palm oil, &c. 884. Epispastics Epispastics are medicines which blister or cause effusion of serum under the cuticle, such as Spanish flies, Burgundy pitch, rosin, and galbanum. 885. Errhines Errhines are medicines which produce sneezing, such as tobacco, &c. 886. Escharotics Escharotics are medicines which corrode or destroy the vitality of the part to which they are applied, such as lunar caustic, &c.