Delayed ejaculation (orgasm in men) is an expected side effect caused by use of any antidepressants in the group of selective serotonin reuptake inhibitors known as SSRIs. Lexapro (escitalopram) is one of these types of SSRIs. That’s why some SSRIs are used for treating premature ejaculation. You can avoid delayed orgasm or anorgasmia by prolonging sexual intercourse or by decreasing the dose of Lexapro if you don’t want to quit Lexapro completely. It's necessary that you consult your psychiatrist before doing so, and should seek advice from your supervising doctor.