Male enhancement pills often claim to increase size naturally, but there is little scientific support for most products. Penis size is influenced by anatomy, tissue structure, genetics, hormones, age, blood flow, and overall health.
Prescription medications may help with erections, but they do not increase penis size. Over-the-counter pills, creams, and supplements are even less reliable. Health Canada warns that unauthorized sexual enhancement products, including some marketed for erectile dysfunction, may contain prescription drugs such as sildenafil, tadalafil, vardenafil, or yohimbine. These ingredients should only be used under the supervision of a health-care provider and may be risky for men taking certain medications.