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CAVERJECT IMPULSE is a medicine that is used to treat impotence
(erectile dysfunction) in adult men.



Learn about the only FDA-approved single-use, prefilled injector for ED with a "dial-a-dose" system to help ensure the dose you set is the exact amount your doctor has prescribed.


Discover CAVERJECT Home Delivery

An alternative to local retail pharmacy, CAVERJECT Home Delivery is a discreet and convenient way to get CAVERJECT IMPULSE delivered right to your front door.



Register for the $20 Co-pay Card, which provides eligible patients with valuable savings on each prescription.

Terms and conditions apply.

Watch the CAVERJECT IMPULSE Administration Video

See for yourself how CAVERJECT IMPULSE is prepared and self-administered after in-office training with a healthcare professional in this instructional video.


CAVERJECT IMPULSE® (alprostadil for injection) is a medicine that is used to treat impotence (erectile dysfunction) in adult men.

Important Safety Information

Do not use CAVERJECT® (alprostadil for injection) if you have certain conditions that might cause long-lasting erections (lasting more than 4 hours). Long-lasting erections may cause penis damage. These conditions include:

  • sickle cell anemia or trait
  • leukemia
  • tumor of the bone marrow (multiple myeloma)

Do not use CAVERJECT if you

  • have a penile implant
  • have an abnormally formed penis
  • have other penis problems
  • were told by your doctor not to have sex

Women and children should not use CAVERJECT.

Some men who use CAVERJECT may get erections that last more than 4 hours. These can cause serious and permanent damage. Call your doctor or seek professional help immediately if you still have an erection 4 hours after injection.

The most common side effect of CAVERJECT is mild to moderate pain after injection. About one-third of patients report this effect.

You may get a small amount of bleeding at the injection site. This is more likely if you have a medical condition or are taking a medicine that interferes with blood clotting.

CAVERJECT does not protect you from sexually transmitted diseases (STDs), such as HIV (the virus that causes AIDS). Small amounts of bleeding at the injection site can increase the risk of passing diseases carried by the blood, such as HIV.

The use of other medical treatments for impotence (erectile dysfunction) in combination with CAVERJECT is not recommended. Discuss any concerns you may have about combination treatment with your doctor.

Call your doctor if you notice any redness, lumps, swelling, tenderness, or curving of the erect penis. Also, tell your doctor about any penis pain you did not have before or other penis problems you have.

There is a possibility of needle breakage with use of CAVERJECT IMPULSE. To best avoid breaking the needle, you should pay careful attention to your doctor's instructions and try to handle the device properly. If the needle breaks during injection and you are able to see and grasp the broken end, you should remove it and contact your doctor. If you cannot see or cannot grasp the broken end, you should promptly contact your doctor.

Patients should always ask their doctors for medical advice about adverse events.

You may report an adverse event related to Pfizer products by calling 1-800-438-1985 (US only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. The FDA has established a reporting service known as MedWatch where health care professionals and consumers can report serious problems they suspect may be associated with the drugs and medical devices they prescribe, dispense, or use. Visit MedWatch or call 1-800-FDA-1088.

Please see full Prescribing Information, Patient Information, and Instructions for Use for CAVERJECT IMPULSE.

The health information contained herein is provided for educational purposes only and is not intended to replace discussions with a health care provider. All decisions regarding patient care must be made with a health care provider, considering the unique characteristics of the patient.

The product information provided in this site is intended only for residents of the United States. The products discussed herein may have different product labeling in different countries.