Caverject is a strict intracavernous injection intended to remedy problems related to erectile dysfunction. It is therefore not a food supplement that you can freely obtain over the counter, but a medicine issued only by prescription. Impotence, or erectile dysfunction, is no longer a real taboo because more and more men are currently suffering from it. Fortunately, treatments exist and the various feedback confirms the effectiveness of these solutions every day.
Everything you should know about Caverject in the rest of the review.
Caverject, another trade name for alprostadil
Caverject comes in the form of a powder on the basis of which an injection is prepared, and administered before taking the action. The active agent in this solution is alprostadil (or prostaglandin E1) which is a fatty acid with vasodilatory properties.
Prostaglandin E1 or PGE1 is marketed everywhere under different trade names: Muse, Edex, Vitaros, Alprox-TD, etc. Caverject is another name adopted by the Pfizer laboratories, very well known in the pharmaceutical field. PGE1 is part of the World Health Organization’s list of essential medicines and is prescribed by doctors in cases of erectile dysfunction because it is known to last 30 to 60 minutes. Alprostadil or PGE1 has failed to compete with Viagra and other similar tablets because of its overly invasive method of administration. It must be said that an injection into the penis is not the best!
Erectile dysfunction, even more common than you think!
It’s just that it’s hard to talk about it in public. The subject of impotence is delicate for a man because it touches on what defines him the most: virility. However, this disorder should be seen as a medical problem like any other problem that can be treated.
Caverject, like any other treatment available today, does not claim to treat impotence in a definitive and irreversible manner.
The injection of alprostadil causes relaxation of the smooth muscles of the penis, which increases blood flow to the penis and makes it possible to have and/or maintain an erection.
These are rather one-off treatments which actually allow you to obtain a satisfactory erection. It changed many mindsets and saved many households, believe me!
Remember that apart from certain psychological problems, impotence is very often the result of biological dysfunctions which concern blood circulation. The blood that irrigates the veins of the penis is the key to any good erection. However, it happens that with age or certain illnesses, the passage of blood to the penis becomes obstructed in one way or another. This is where solutions like Caverject come in.
Caverject dosage: an injection under medical supervision
It is up to your doctor to prescribe the dose that suits you best. Caverject comes in several dosages to be prescribed depending on the patient’s condition:
- Caverject Vials 5mcg : If you are using Caverject for the first time, your doctor will probably prescribe this dose to check that the treatment is suitable for you.
- Caverject Vials 10mcg : It may be prescribed if the test dose has not produced any adverse effects.
- Caverject Vials 20mcg : If the 10mcg dosage has not produced the desired effects, you may be prescribed the 20mcg dosage.
- Caverject Vials 40mcg : This is the maximum dose and will only be prescribed if the 40mcg dosage has been ineffective.
- Caverject Dual Chamber 10mcg : the dose usually prescribed for men trying this medication for the first time.
- Caverject Dual Chamber 20mcg : If you have already tried the 10mcg dosage and it is not completely effective, this dosage is recommended for you.
How to use Caverject?
The first use of Caverject will take place at the doctor’s office and under his supervision. Indeed, it is an injection which must be carried out at the level of the corpus cavernosum and not in the veins of the penis. The following image shows the two side areas of the penis that can receive the injection.

Be sure to inject in the shaded areas, to avoid veins.
Afterwards, the doctor will need to train you to self-administer the following individual doses. A procedure to follow is well explained by the doctor, but also in the medication brochure, in pictures. Below, you can consult this brochure in French: Caverject instructions French .
It is recommended not to exceed 3 applications per week. It is also recommended to leave more than 24 hours between two applications.
Contraindications Caverject
If you have any of the following conditions or if any of the following situations apply to you, tell your doctor before you start taking CAVERJECT or during treatment if applicable:
- sickle cell anemia (abnormality of red blood cells) or history of sickle cell anemia, multiple myeloma (bone marrow cancer) or leukemia;
- erection lasting more than 4 hours;
- penile deformity or Peyronie’s disease;
- wearing a penile implant;
- bleeding disorders or taking medications that prevent blood from clotting, such as warfarin or heparin.
Caverject side effects
Caverject is a medication that can have noticeable side effects. This will involve, to different degrees, the following effects:
Common
erection . IMPORTANT: if the erection persists beyond 4 hours, seriously consider medical intervention. Pain in the penis after injection or during erection. Burning sensations, discomfort or a feeling of tension in the penis.
Uncommon
Bruising (hematoma, ecchymosis) at the injection site. Scar tissue formation inside the penis, irritation, tenderness, rash on the penis, and penile edema (excess fluid in the tissues).
Rare
Pain in the testicles or at the base of the penis. Erythema (redness of the skin). Penile bumps. Sensitivity. ejaculation . Curvature of the erect penis. Balanitis (inflammation of the tip of the penis). Itching. Swelling. Inflammation or bleeding at the injection site. Urethral bleeding. Urethral injuries due to poor injection technique. Changes in blood pressure. Irregular heartbeat. Accelerated pulse. Dizziness . Headache. Fainting .
You will also need to check whether or not you are allergic to alprostadil.
In any case, do not hesitate to consult your pharmacist or doctor if any of the effects become very worrying.
Buy Caverject online
Caverject is a medicine. This means that you can have it at your local pharmacy, with your prescription.
However, there are more and more online pharmacies that offer the possibility of buying medicines like Caverject online, from 54 euros .=. It will be necessary to ensure that these pharmacies on the web are indeed linked to physical pharmacies which can redirect you, if necessary, to accredited doctors, for prescription.
My opinion on Caverject
This is undoubtedly an effective but very invasive method of administration which would be recommended for certain people who cannot do otherwise. Local treatment is by far the most effective, especially with age. However, you should not hope for magic wand erections: you will always need a sexy atmosphere and natural stimulation.
Me? No thanks, I’ll pass… I would much prefer the tablets or the creams!
Hello, I have used Caverject 10 several times, 30 minutes after the injection these parts for an erection which will last between 3 and 4 hours good hardness but I will have to try Caverject 20 to see if my penis is much harder, if anyone can enlighten me on this subject thank you
Hello Laruelle,
It’s good to have results that you’re happy with. However, you should not force it! If you can already get decent erections during the next 4 hours…well, you’re in luck!
Be careful with the daily dose though: you don’t want to harm yourself.
Good luck.