Caverject (alprostadil) — what it is and when people use it

Caverject is a prescription injectable medicine that contains alprostadil. People use it to get an erection when oral treatments don’t work or aren’t an option. It works locally in the penis, so it usually acts fast — often within 5–20 minutes — and the effect lasts from about 30 minutes up to an hour for most men.

If you’re thinking about Caverject, talk to your doctor first. They’ll check your heart health, medications, and any penile issues that could make injections risky. Your doctor or nurse should show you how to prepare the dose and inject safely before you try it alone.

How Caverject works and what to expect

Alprostadil relaxes blood vessels in the penis and increases blood flow. That makes the shaft fill with blood so you can get an erection. Your provider will usually start with a low dose and increase it until you get a firm but comfortable erection. Typical starting doses are small (often in the low microgram range) and adjusted step by step under medical supervision.

Common side effects are mild penis pain, redness, or bruising at the injection site. A serious but rare risk is priapism — a painful erection lasting more than four hours. If that happens, get emergency care right away to avoid permanent damage. Also mention blood thinners to your doctor because they can increase bleeding or bruising after injection.

Safe use, storage, and buying tips

Injection basics: wash your hands, use a clean surface, and follow the exact syringe and dose instructions you were taught. Rotate injection sites along the sides or base of the penis to reduce scarring. Never inject into a vein or the urethra. If you feel sharp pain or see unusual swelling, stop and call your provider.

Store Caverject in the fridge. Some formulations can stay at room temperature for a short time before use — check the label. Keep it out of reach of children and don’t use expired product.

You need a prescription. If buying online, pick pharmacies that require a prescription, show clear contact info, and have verified reviews. Avoid offers that sound too cheap or don’t ask for a prescription. If you’re unsure, call a local pharmacy or your clinician for help.

Final practical note: Caverject can work when other treatments fail, but it takes practice. Ask for hands-on training, start with a clinic-based dose if possible, and keep clear notes on what dose works and any side effects. That record makes follow-up visits simple and helps your provider fine-tune treatment safely.