Frequently Asked Questions
Although your doctor is the best source for answering your specific questions about erectile dysfunction (ED) and treatment with CAVERJECT IMPULSE, you can find answers to common questions here.
General Information About CAVERJECT IMPULSETop
What is CAVERJECT IMPULSE?
CAVERJECT IMPULSE is a prescription medicine used:
- to treat erectile dysfunction (ED).
- with other medical tests to diagnose ED.
CAVERJECT IMPULSE is not meant for use in women or children under 18 years of age.
How long does it take for CAVERJECT IMPULSE to work?
After injection, you can expect an erection to occur within 5 to 20 minutes. Your erection should last no longer than an hour.
Can I travel with CAVERJECT IMPULSE?
Yes. You can take CAVERJECT IMPULSE with you when you are on the go via car, plane, or train. However, it is important to remember that unmixed packages of CAVERJECT IMPULSE should be stored at room temperature (68° F to 77° F). During travel, CAVERJECT IMPULSE should not be stored in checked luggage or left in a closed automobile that may get too cold (below 59° F) or too hot (above 86° F).
Saving on CAVERJECT IMPULSETop
What is the CAVERJECT IMPULSE Savings Card?
The CAVERJECT IMPULSE Savings Card allows eligible patients to pay as little as $20 every time they get a fill of brand-name CAVERJECT IMPULSE—and could save up to $600 per card. If you have a prescription for CAVERJECT IMPULSE, you can use the card for every fill through December 31, 2020.*
How do I use the CAVERJECT IMPULSE Savings Card?
There are 2 ways to use the card immediately. Once you’ve activated your Savings Card, you can either:
- Bring a printed copy of it to the pharmacy
- Show it to your pharmacist on your phone
You can keep this card with you and continue to save on each fill for CAVERJECT IMPULSE through December 31, 2020.
Who is eligible to use the CAVERJECT IMPULSE Savings Card?
To be eligible to use a CAVERJECT IMPULSE Savings Card, you must:
- Be 18 years of age or older
- Not be covered by Medicare, Medicaid, or any other federal or state healthcare programs
To learn the full details of who is eligible, please see the full Terms and Conditions.
How do I get a CAVERJECT IMPULSE Savings Card?
To get a Savings Card, register here and then download your card or have it sent to you via mail or email.
If I already have a CAVERJECT IMPULSE Savings Card, how can I activate it?
You can activate your Savings Card here.
Can I use the CAVERJECT IMPULSE Savings Card on a previously filled prescription?
The CAVERJECT IMPULSE Savings Card can only be used for new prescriptions that are filled after you have activated the card.
Does the CAVERJECT IMPULSE Savings Card work at nonparticipating pharmacies?
Yes, for reimbursement when using a nonparticipating pharmacy: Pay for your CAVERJECT IMPULSE prescription and mail a copy of the original pharmacy receipt (cash register receipt NOT valid) with the product name, date, and amount circled to: Pfizer, ATTN: CAVERJECT, PO Box 4935, Warren, NJ 07059-6600. Be sure to include a copy of the front of your CAVERJECT IMPULSE Savings Card, your name, and mailing address. Please expect up to 4 to 6 weeks for reimbursement.
Does the CAVERJECT IMPULSE Savings Card work through mail-order pharmacies?
Yes, for reimbursement when using the CAVERJECT IMPULSE Savings Card through a mail-order pharmacy: Pay for your CAVERJECT IMPULSE prescription and mail a copy of the original pharmacy receipt (cash register receipt NOT valid) with the product name, date, and amount circled to: Pfizer, ATTN: CAVERJECT, PO Box 4935, Warren, NJ 07059-6600. Be sure to include a copy of the front of your CAVERJECT IMPULSE Savings Card, your name, and mailing address. Please expect up to 4 to 6 weeks for reimbursement.
Using CAVERJECT IMPULSETop
What should I tell my healthcare provider before using CAVERJECT IMPULSE?
Before you use CAVERJECT IMPULSE, tell your healthcare provider if you:
- have had an erection that lasted more than 4 hours
- have sickle cell trait or sickle cell anemia
- have or have had a blood cell cancer called multiple myeloma or leukemia
- have a deformed penis shape
- have a penile implant
- have low blood pressure (hypotension)
- have bleeding problems
- have or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve or heart failure
- have any other medical conditions
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.
CAVERJECT IMPULSE may affect the way other medicines work, and other medicines may affect the way CAVERJECT IMPULSE works causing side effects.
Especially tell your healthcare provider if you take any other medicines that are injected into your penis (intracavernosally) or certain medicines called anticoagulant medicines (such as heparin or warfarin).
Ask your healthcare provider or pharmacist for a list of these medicines, if you are not sure.
Know the medicines you take. Keep a list of them to show to your healthcare provider and pharmacist when you get a new medicine.
How should I use CAVERJECT IMPULSE?
- See the detailed Instructions for Use or watch the CAVERJECT IMPULSE Administration Video for information about how to prepare and inject CAVERJECT IMPULSE the right way
- Use CAVERJECT IMPULSE exactly as your healthcare provider tells you to
- Your healthcare provider will tell you how much CAVERJECT IMPULSE to use and when to use it
- Your healthcare provider may change your dose if needed. Do not change your dose of CAVERJECT IMPULSE without first talking to your healthcare provider
- Your healthcare provider should show you how to prepare and inject CAVERJECT IMPULSE the right way before you inject it for the first time
- CAVERJECT IMPULSE should not be used more than 3 times per week
- CAVERJECT IMPULSE should not be used more than 1 time every 24 hours
- Change the exact place and side of the penis that you inject CAVERJECT IMPULSE each time you use it
- CAVERJECT IMPULSE is for one use only and should be thrown away properly after a single use
You should see your healthcare provider every 3 months for check-ups to be sure that CAVERJECT IMPULSE is working the right way and to change your CAVERJECT IMPULSE dose if needed.
How often can I use CAVERJECT IMPULSE?
CAVERJECT IMPULSE should be used no more than 3 times per week, with at least 24 hours between each use.
What should I do with the remaining medicine in the syringe after an injection of CAVERJECT IMPULSE?
CAVERJECT IMPULSE is for one use only and should be thrown away properly after a single use. Your dose has been selected for your individual needs. Do not change your dose for self-injection without consulting your doctor.
How do I dispose of CAVERJECT IMPULSE?
After your injection:
Dispose of your used CAVERJECT IMPULSE syringes and needle.
- Put your used CAVERJECT IMPULSE syringe and needle in an FDA-cleared sharps disposal container right away after use. Do not throw away (dispose of) loose needles and syringes in your household trash
- If you do not have an FDA-cleared sharps disposal container, you may use a household container that is:
- made of a heavy-duty plastic
- can be closed with a tight-fitting, puncture-resistant lid, without sharps being able to come out
- upright and stable during use
- properly labeled to warn of hazardous waste inside the container
- When your sharps disposal container is almost full, you will need to follow your community guidelines for the right way to dispose of your sharps disposal container. There may be state or local laws about how you should throw away used needles and syringes. Do not reuse or share your needles or syringes with other people. For more information about the safe sharps disposal, and for specific information about sharps disposal in the state that you live in, go to the FDA’s website at: http://www.fda.gov/safesharpsdisposal
- Do not dispose of your used sharps disposal container in your household trash unless your community guidelines permit this. Do not recycle your used sharps disposal container
How should I store my CAVERJECT IMPULSE?
- Store unmixed CAVERJECT IMPULSE at room temperature between 68°F to 77°F (20°C to 25°C).
- Store mixed CAVERJECT IMPULSE between 36 to 77°F (2°C to 25°C). Do not freeze.
- CAVERJECT IMPULSE should be used within 24 hours after it is mixed. Keep CAVERJECT IMPULSE and all medicines out of the reach of children.
Safety & Possible Side EffectsTop
Who should not use CAVERJECT IMPULSE?
Do not use CAVERJECT IMPULSE 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
- tumor of the bone marrow (multiple myeloma)
Do not use CAVERJECT IMPULSE 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 IMPULSE.
What are the most common side effects of CAVERJECT IMPULSE?
The most common side effects of CAVERJECT IMPULSE include:
- penile pain
- erection lasting 4 to 6 hours (prolonged erection)
- penile fibrosis (deformed penis shape)
- bruising at the injection site
- penile numbness, irritation, sensitivity, itching, swelling and discoloration
- skin tears of the penis
- penile rash
Tell your healthcare provider if you have any side effect that bothers you or that does not go away.
These are not all the possible side effects of CAVERJECT IMPULSE. For more information, ask your healthcare provider or pharmacist.
Call your doctor for medical advice about side effects. You may report side effects to FDA at
What are the possible side effects of CAVERJECT IMPULSE?
CAVERJECT IMPULSE may cause serious side effects, including:
- an erection that will not go away. If you have an erection that lasts more than 4 hours, get medical help right away. If it is not treated right away, this condition can permanently damage your penis
- deformed penis shape (penile fibrosis). Your healthcare provider should check your penis regularly for signs of penile fibrosis. You should not continue to use CAVERJECT IMPULSE if you get penile fibrosis
- low blood pressure (hypotension)
- injection site bleeding. People who take certain medicines called anticoagulants (such as heparin or warfarin) may have a risk for increased bleeding at the injection site
- increased risk of heart problems. Sexual activity can put an extra strain on your heart, especially if your heart is weak from a heart attack or heart disease. Ask your healthcare provider if your heart is healthy enough to handle the extra strain of having sex. Stop sexual activity and get medical help right away if you get symptoms of a heart problem such as chest pain, dizziness or nausea
- needle breakage. 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 healthcare provider’s instructions and try to handle the syringe and needle properly. If the needle is bent at any time, do not attempt to straighten it and do not use it. A bent and re-straightened needle is predisposed to breakage. Remove the needle from the syringe, discard, and attach a new, unused sterile needle to the syringe. If the needle breaks during injection and you are able to see and grasp the broken end, you should remove it and contact your healthcare provider. If you cannot see or cannot grasp the broken end, you should promptly contact your healthcare provider.
- benzyl alcohol toxicity. Benzyl alcohol is a preservative in CAVERJECT IMPULSE. Benzyl alcohol has caused serious side effects, including death, in children, especially premature and low-birth weight infants, who have received the preservative benzyl alcohol. CAVERJECT IMPULSE is not meant for use in children.
CAVERJECT IMPULSE does not protect you or your partner from getting sexually transmitted infections, including HIV—the virus that causes AIDS.
What should I do if I have an erection for more than 4 hours after using CAVERJECT IMPULSE?
Some men who use CAVERJECT IMPULSE 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.
About Erectile DysfunctionTop
What are the causes of and treatments for erectile dysfunction?
There are several causes of erectile dysfunction (ED). These include medications that you may be taking for other conditions, poor blood circulation in the penis, nerve damage, emotional problems, too much smoking or alcohol use, use of street drugs, and hormonal problems. Often, ED is due to more than one cause.
Treatments for ED include switching medications if you are taking a medication that causes erectile dysfunction, prescription medications, medical devices that produce an erection, surgical procedures to correct blood flow in the penis, penile implants, and psychological counseling.
You should not stop taking any prescription medications, unless told to do so by your doctor.
The use of other medical treatments for ED in combination with CAVERJECT IMPULSE is not recommended. Discuss any concerns you may have about combination treatment with your doctor.