Originally created as a treatment for nasal congestion in the 1930s, amphetamine is a powerful central nervous stimulant that can alter the user’s sense of reality, make behaviour unpredictable and violent, and have serious long-term effects to physical and mental health. Although the drug was first intended to relieve respiratory symptoms, those who used it found that it did not serve this purpose. However, they did report feelings of euphoria, and as a result, it was marketed as a treatment for “psychological tiredness”. Amphetamine use continued for several decades before the medical field determined that most medical benefits were outweighed by the risks and the potential for addiction. Today, medical use of amphetamine is limited to the treatment of a small number of conditions, such as attention deficit hyperactivity disorder (ADHD) and narcolepsy.