sertraline UK /ˈsɜː.tɹəˌliːn/US /ˈsɜɹ.tɹəˌlin/ noun1 •An antidepressant drug C₁₇H₁₇NCl₂ administered in the form of its hydrochloride and acting to enhance serotonin activity.Sertraline, 50 mg. Insomnia worsened, severe anxiety, anorexia, (weight loss 17kgs,) increase in suicidal thougts, plans, and intention. Discontinued following hospitalization. — 2002