The user is stimulated both physically and mentally. XTC (also known as Extacy and MDMA) has the ability to suppress exhaustion which doesn't mean that the fatigue is gone but that it is only masked. After the rush, the feeling of fatigue returns more heavily. At the same time, perception intensifies. Under the influence of XTC, people tend to get more intimate with others. Effects generally appear within 20-60 minutes. The first hour after that the effects are felt the most. After 4-6 hours the effects are gone but some people still feel the effects the following day. That can be a nice feeling, but also an empty and depressed feeling. A depressive or miserable mood can last for days. Side effects are tension in the jaws, palpitations (rapid or irregular heart beat), a dry mouth and throat, nausea and shortness of breath. Sometimes, movements are difficult to co-ordinate. These negative effects can lead to panic attacks, and are quality and dose dependent and will vary depending on sensibility, mood, expectations and the health of the individual user. Last but not least, the environment can also influence the effects.