To give papaverine injection:
Cleanse the injection site with alcohol. Using a sterile needle, inject the medicine slowly and directly into the base of the penis as instructed by your doctor. Papaverine should not be injected just under the skin. The injection is usually not painful, although you may feel some tingling in the tip of your penis. If the injection is very painful or you notice bruising or swelling at the place of injection, that means you have been injecting the medicine under the skin. Stop, withdraw the needle, and reposition it properly before continuing with the injection.
After you have completed the injection, put pressure on the place of injection to prevent bruising. Then massage your penis as instructed by your doctor. This helps the medicine spread to all parts of the penis, so that it will work better.
This medicine usually begins to work in about 10 minutes. You should attempt intercourse within 2 hours after injecting the medicine.
The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
For injection dosage form:
For the treatment of erectile dysfunction:
Adults—30 to 60 milligrams (mg) injected very slowly into the area of your penis as directed by your doctor. Allow one or two minutes to completely inject the dose. Do not inject more than one dose in a day. Also, do not use this medicine more than two days in a row or more than three times a week.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.