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As part of the Frosts Pharmacy Group, a family run business established in 1925 by John Frost and now run by his grandson Stuart Gale, we are a fully registered UK pharmacy and adhere to the standards set by the General Pharmaceutical Council. We run successful high street pharmacies in Banbury and Oxford, in the UK, as well as our online chemist services.

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Caverject Dual Chamber (Alprostadil)

Caverject Dual Chamber (Alprostadil)

£ 36.99
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Buy Caverject Dual Chambers online in the UK

Caverject Dual Chamber is used for erectile dysfunction including weak erections or impotence.

Caverject Dual Chamber should be administered by direct intracavernosal injection using the needle provided. The usual injection site is along the dorsolateral aspect of the proximal third of the penis. Visible veins should be avoided. View the Caverject Dual Chamber guidance for patients here. 

An erection induced by this medicine should typically occur within 5 to 20 minutes and remain for about an hour. The manufacturer advises using this drug no more than three times weekly, with a minimum of one day between each dose.

There are two variations of Caverject: Caverject Dual Chamber and Caverject Vials. The Caverject powder is the component that makes the vial and dual chamber active. The key difference is that, if you choose the dual chamber, the solution and powder chambers are in the device; all you need to do to combine them is turn the plunger. If you choose the vials, you will need to mix the powder with the supplied liquid solution together before injecting.


Caverject Dual Chamber (Alprostadil) reviews

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How to use Caverject Dual Chamber (Alprostadil)

To find full and in-depth instructions on how to use Caverject 10 mcg, consult your Patient Information Leaflet for complete guidance and direction.

  • The starting dose in the clinic is 1.25-2.5 micrograms, doses lower than 2.5 micrograms cannot be delivered with Caverject Dual Chamber. In this case, Caverject powder for injection will be used.
  • Most men find that a dose of 5-20 micrograms works for them, however, some men may require a higher dose. You should never use more than 40 micrograms.
  • If this treatment is being used to find the reason for your erectile dysfunction, the dose will be 5-20 micrograms.
  • Do not use Caverject more than once in 24 hours or more than three times in a week.
  • Change the location and side of the penis that you inject into each time you use it.
  • This is a single-use medication; any unused contents of the syringe should be discarded in a safe container such as a sharps bin or needle clipper.
  • Do not use the Caverject solution if the inside of the injection is non-transparent or contains small pieces.

It is normal for it to take a short while for your erection to come on after administering your injection. However, with the right dose of Caverject, you will be able to maintain an erection. When using Caverject, your erection should subside no longer than an hour after taking the treatment.* If your erection lasts longer than four hours, you should contact your doctor to seek medical advice.

If Caverject 10 mcg does not work well enough, talk to your doctor for guidance. Do not change your dose unless your doctor tells you to.

If you are using Caverject Dual Chamber for the first time and you have previously used Caverject Powder for Injection, your doctor should have given you advice about using this medication.

*Disclaimer: Individual results may vary.


Side effects of Caverject Dual Chamber (Alprostadil)

Side Effects of Alprostadil

With any medication you take, there is always a risk of side effects. Some are more common than others, and often side effects may subside with the regular usage of the medicine. If the side effects do not subside, you should report them to us, or your GP.

Common side effects  

  • Penis can become bruised, scarred, bent or kinked, particularly after long term use. Tell your doctor if this happens as you may need to stop Caverject Dual Chamber
  • Prolonged erections
  •  Other problems with your penis
  • Swelling and skin discolouration or bruising at site of injection. You may find this happening the first time you use Caverject Dual Chamber but should occur less often with practice
  • Muscle spasms.

Tell your doctor immediately if your erection goes on for longer than 4 hours. If you cannot contact your doctor, go to a hospital casualty department immediately as treatment should be started within 6 hours. 

For a full list of side effects, please read the patient information leaflet.

Frequently Asked Questions

How many times can I use Caverjet?

Before administering the subsequent dose, at least one day should pass if there is a result. Typically, injections should be administered no more frequently than three times per week and no more than once per day. Alprostadil must be injected for the first time by a person with medical training.

Can I buy Caverject Dual Chamber Online?

Patients with erectile dysfunction can request Caverject through Oxford Online Pharmacy. Although, our doctors can consider Caverject if you have tried medications like Viagra, Cialis, and Levitra and they failed or gave you unsatisfactory results.

Where is the best place to inject Caverject?

In the proximal third of the penis, insert a needle perpendicular to the long dorsolateral penile axis. Do not bend the needle, and do not angle the syringe. During the injection, stay away from any obvious veins. Alternate which side of the penis is injected with each injection of Caverject.

How painful is Caverject?

To release the medication into the penis, steadily depress the plunger; this should take 5 to 10 seconds. Typically, the injection is painless. If the injection is excruciatingly painful or if you notice bruising or swelling at the injection site, you are injecting the medication under the skin.

What does Caverject Dual Chamber contain?

Alprostadil is the active component of Caverject Dual Chamber. Each cartridge's front chamber can only deliver 10 or 20 micrograms of alprostadil in 0.5 ml, depending on the dosage you were given. 
The other ingredients are lactose monohydrate, alfadex, sodium citrate, hydrochloric acid and sodium hydroxide. The diluent in the rear compartment is Bacteriostatic Water for Injection and contains 0.9% w/v benzyl alcohol and water for injections. The cleaning swabs are soaked in isopropyl alcohol.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Caverject Dual Chamber (Alprostadil) - Patient Information Leaflet

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Authored on 15 April 2021

Stuart Gale

Stuart Gale - BSc (Hons) MRPharmS

Pharmacist and Owner

GPhC Number: 2039889

Reviewed on 15 April 2021

Robert Bradshaw

Robert Bradshaw - MRPharms BSc(Hons) Pharmacy

Superintendent Pharmacist

GPhC Number: 2036118

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