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How does a penile injection for erectile dysfunction (ED) work?

Marc B. Garnick, MD
Hematology & Oncology
Using a small needle, a man can inject one or more prescription drugs for erectile dysfunction (ED) into the side of his penis. The injected drugs work by relaxing the smooth muscle tissue of the penis and allowing blood to flow into the erectile tissue.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.