5 x Caverject (Alprostadil) 20mcg/0.5ml Dual Chamber 2 Injections

Please read the patient information leaflet for instructions on how to use and administer. Use only as instructed by the doctor.

Most men find that a dose of 5-20 micrograms works for them, however, some men may require a higher dose. Please note that you should never use more than 40 micrograms of Caverject.

• Do not try to inject yourself until you have learnt how to administer Caverject correctly.
• Remove one of the injection devices and needles and attach the needle to the device.
• Turn the plunger rod clockwise until it stops.
• Remove the inner protective cap from the needle and flick the cartridge with your finger to remove any air bubbles.
• Turn the plunger rod clockwise to select your dose.
• Before injecting, you must ensure that the needle is not bent.
• Using the alcohol swab, wipe over the area and let it dry.
• Keeping a firm grip on the penis and taking the syringe in your free hand, push the needle straight through the skin all the way into the base of the penis.
• Do not use Caverject Dual Chamber more than once in 24 hours or more than three times in a week.
• Change the exact place and side of the penis that you inject Caverject Dual Chamber each time you use it.
• Do not reuse any leftover mixture.

It will take a short while for your erection to come on after the Caverject injection. When using this medication, your erection should not last longer than one hour.* However, If your erection lasts longer than four hours, you should seek immediate medical advice.

If the dose that has been prescribed for you does not work well enough, tell your doctor. Do not alter your dose unless your doctor informs you to.

*Disclaimer: Individual results may vary.

The active ingredient in Caverject Dual Chamber is alprostadil. Depending on the strength you have been given, the front compartment of each cartridge delivers a maximum of 10 or 20 micrograms of alprostadil in 0.5ml.

The other ingredients are lactose monohydrate, alfadex, sodium citrate, hydrochloric acid and sodium hydroxide.

The diluent in the rear compartment is bacteriostatic and contains 0.9% w/v benzyl alcohol and water for injections. The antiseptic pads are soaked in isopropyl alcohol.

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.