Hot flashes are a signature symptom of menopause, but for some women, they last far longer than expected—sometimes up to 15 years. What causes them, and why do they vary so much from person to person?

All women recorded hot flashes for 7 days before starting treatment and were then titrated to citalopram at daily target doses of 10 mg, 20 mg or 30 mg versus placebo to evaluate the change in ...