DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Erectile dysfunction treatment drug. Man loading a syringe with the drug alprostadil (prostaglandin), ready for self-administration. Alprostadil is used in the treatment of erectile dysfunction. It is injected directly into the tissue of the penis where it causes the blood vessels to dilate (vasodilation), allowing more blood flow into the tissue, which caused an erection.
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