Cathartic

Etymology
From κάθαρσις:

Adjective

 * 1) purgative; inducing catharsis
 * 2) That releases emotional tension, especially after an overwhelming experience

Noun

 * 1) A laxative

Thesaurus
abstergent, alleviating, alleviative, analgesic, anesthetic, anodyne, aperient, assuasive, balmy, balsamic, benumbing, carminative, cleaner, cleaning, cleaning agent, cleaning solvent, cleanser, cleansing, cleansing cream, cold cream, cream, deadening, demulcent, dentifrice, depurant, depurative, detergent, diuretic, dulling, easing, emetic, emollient, enema, expurgatory, holystone, laxative, lenitive, lotion, lustral, mitigating, mitigative, mouthwash, nauseant, numbing, pain-killing, palliative, physic, pumice stone, purgative, purge, purging, purificatory, purifier, purifying, relieving, remedial, rinse, shampoo, soap, softening, solvent, soothing, subduing, synthetic detergent, tooth powder, toothpaste, wash