If you experience an erection lasting longer than four hours (priapism) while taking Cenforce 150 or any other medication for erectile dysfunction (ED), it is important to seek medical attention immediately. Priapism can be a serious condition and if left untreated can lead to permanent damage to the penis.

In the case of priapism, it is important to discontinue the use of the medication and seek prompt medical attention. Your doctor will be able to advise on the best course of treatment, which may involve draining the blood from the penis or administering medication to decrease the blood flow to the penis and relieve the priapism.

It's important to follow the instructions of your doctor and not self-treat. Additionally, it's important to talk to your doctor before taking Cenforce or any other ED medication to ensure it is safe and appropriate for you and to discuss any potential risks and side effects.