Can I change my mind after I’ve signed the consent?

You can change your mind at any time, even if you’ve already started treatment. Most consent forms say that you also have the right to stop treatment or withdraw from a study even after you have signed a consent form. Even if the form does not mention it, you still have this right. You would need to contact the doctor in charge of your treatment or the clinical trial to make your wishes known. You may be asked to sign a form refusing further treatment so that the doctor or facility will have a legal record of this. (See the next section, “What if I don’t want the treatment that’s being offered?”)

The American Cancer Society medical and editorial content team
Our team is made up of doctors and master’s-prepared nurses with deep knowledge of cancer care as well as journalists, editors, and translators with extensive experience in medical writing.

Last Medical Review: May 20, 2016 Last Revised: July 28, 2014

American Cancer Society medical information is copyrighted material. For reprint requests, please see our Content Usage Policy.