Some older studies suggest that statins might decrease sex drive by reducing the body's production of its own cholesterol, the common precursor to sex hormones including testosterone. But more recent studies suggest otherwise. "There's conflicting data," explains Dr. Mohit Khera, Associate Professor of Urology and Director of Andrology at Baylor College of Medicine. "Statins may cause erectile dysfunction in the short-term, but they may actually improve sexual function in long-term treatment … because they improve lipid function." Decreasing cholesterol levels improves overall circulation in the body and increases blood flow to the penis.