Stimulant abstinência including amphetamines, methamphetamine and methcathinone is a clinically significant cluster of symptoms, behaviours and/or physiological features, varying in degree of severity and duration, that occurs upon cessation or reduction of uso of stimulants in individuals who have developed Stimulant dependência or have used stimulants for a prolonged period or in large amounts. Stimulant abstinência can also occur when prescribed stimulants have been used in standard therapeutic doses. Presenting features of stimulant abstinência may include dysphoric mood, irritability, fatigue, insomnia or (more commonly) hypersomnia, vivid and unpleasant dreams, increased appetite, psychomotor agitation or retardation, and craving for amphetamine or related stimulants.