Yes, you can. Edex is the brand name for the medicine Alprostadil in the United States and some other areas of the world.
Edex is sold in the UK under the brand names Caverject and Viridal Duo. This means that Edex, Caverject and Viridal are the same medicine; the only difference is the brand name and where they’re sold.
Buy Caverject online
You can buy Caverject and Viridal Duo online from Oxford Online Pharmacy with a doctor's prescription. These are the UK alternatives to Edex.
How to order Caverject online
- Complete our medical consultation. This allows our doctors to check that ED Injections are safe and appropriate for you.
- Select your preferred strength and quantity to add to your basket before completing checkout.
- One of our UK-registered doctors will review your order and prescribe your preferred treatment if appropriate. Occasionally we need extra information and will contact you via our confidential message centre.
- Your order will be packaged and posted from our pharmacy via our tracked delivery service.
How do Alprostadil Injections work?
Caverject and Viridal injections are used to treat erectile dysfunction (ED) in men. The active ingredient, Alprostadil also known as prostaglandin E1 belongs to a group of medicines called Vasodilators, they work by enhancing the blood flow to the penis by widening the blood vessels which helps produce an erection. This is the same function as Edex. 1
Complete a consultation to order Edex UK alternatives
Start ConsultationErectile dysfunction injections
Edex
- Brand name: Edex
- Active ingredient: Alprostadil
- Available strengths: 10mcg, 20mcg, 40mcg
- Dose: 1 injection when needed (no more than 3 times a week)
- Time it takes to work: 5-20 minutes
- Time effects last: 1 hour
Edex Injections are the US version of Caverject and Viridal, this particular brand isn't available in the UK. You find below our UK alprostadil injections:
Caverject

- Brand name: Caverject
- Active ingredient: Alprostadil
- Available strengths: 10mcg, 20mcg, 40mcg
- Dose: 1 injection when needed (no more than 3 times a week)
- Time it takes to work: 5-20 minutes
- Time effects last: 1 hour
Follow this link to read the patient information leaflet for Caverject Injections.
Viridal Duo

- Brand name: Viridal Duo
- Active ingredient: Alprostadil
- Available strengths: 10mcg, 20mcg, 40mcg
- Dose: 1 injection when needed (no more than 3 times a week)
- Time it takes to work: 10 -15 minutes
- Time effects last: 1 hour
Follow this link to read the patient information leaflet for Viridal Duo injections.
How to inject Alprostadil?
You can find a diagram of how to use the pens and how they are injected into the penis on the patient information leaflets.
You should always make sure the injection site is clean by using an alcohol swab.
You must hold the needle straight to the side of the penis where you will be injecting the medicine. If you inject this medicine and the needle isn’t straight you could cause extreme penile pain.
You shouldn’t inject more than once in 24 hours and do not use this medicine more than 3 times a week.
We can only provide Caverject and Viridal to people who have been trained by a medical professional on how to use these treatments.
Complete a consultation to order ED Treatments
Start ConsultationPossible side effects
Side effects are possible with any medicine, although not everyone will experience them.
A more common side effect of using Alprostadil injections is experiencing mild to moderate discomfort during the injection process. In addition, erections induced by the medication may also be accompanied by pain. Should you experience intense pain, it's advisable to contact your doctor straight away. 2
If you experience any signs such as redness, lumps, swelling, tenderness, or curvature of the erect penis, it's important to consult your doctor promptly.
Occasional bleeding at the injection site might occur. To minimise bruising, apply firm pressure at the injection site for approximately 5 minutes, continuing until bleeding stops.
You must Inform your doctor if you have any underlying conditions or if you're taking medications that may affect blood clotting.
For a full list of side effects and ED injection warnings, you can refer to the patient information leaflet.
Other erectile dysfunction treatments
Now we have established the alternatives to Edex in the UK, you should know there are many more erectile dysfunction treatments available in the UK. We stock erectile dysfunction tablets, including Sildenafil, Viagra, Tadalafil tablets and many more. Topical ED treatments such as Eroxon Stimgel and Vitaros Cream. You can find our full range of erectile dysfunction treatments here.
You can also read more about how they differ from one another here.
References
- National Center for Biotechnology Information. "Prostaglandin E1."
- National Center for Biotechnology Information. "Alprostadil."