Phentolamine Injection

Name: Phentolamine Injection

For the Consumer

Applies to phentolamine: injection injectable, injection powder for solution, injection solution

Along with its needed effects, phentolamine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking phentolamine:

Rare
  • Dizziness
  • erection continuing for more than 4 hours, or painful erection
  • lumps in the penis

Some side effects of phentolamine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common or rare
  • Bruising or bleeding at place of injection
  • burning (mild) along penis
  • difficulty in ejaculating
  • swelling at place of injection

Phentolamine injected into the penis may cause tingling at the tip of the penis. This is no cause for concern.

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