The term premenstrual dysphoric disorder (PMDD) specifically defines a condition in which premenstrual psychiatric symptoms must involve impairment in function.1 The condition is estimated to affect 3% to 5% of women.2 Symptoms occur at regular intervals and are primarily confined to the luteal phase of the menstrual cycle. Ideally, the diagnosis is made with prospective mood tracking to ascertain clearly whether symptoms are cycle-related. PMDD is a relatively new term; older literature commonly defines a similar clinical condition as the mood symptoms associated with severe premenstrual syndrome (PMS).