Ecstasy is illegal in most, if not all, countries. In the United States, it is classified as a "Schedule I" drug. Schedule I drugs have no official medical use and are highly addictive. Some scientists believe Ecstasy may be useful in therapy since it has been found to reduce fear in some individuals. Recently, there has been some research on if it can help people with severe PTSD confront painful memories during therapy appointments. It may also have potential to help people diagnosed with cancer manage their anxiety about death.