The
medicine is injected directly into the penis using a very small needle and
syringe. The erection can last for 30 minutes or longer depending on how much medicine is used.
| By | Healthwise Staff |
| Primary Medical Reviewer | E. Gregory Thompson, MD - Internal Medicine |
| Specialist Medical Reviewer | Christopher G. Wood, MD, FACS - Urology, Oncology |
| Last Revised | May 14, 2012 |
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