At low doses, it boosts alertness and blocks hunger and fatigue. At higher doses, it causes exhilaration and euphoria. At very high doses, the drug can cause agitation, paranoia, and bizarre behavior. Physical effects include increased heart rate, blood pressure, and body temperature. Anxiety, emotional swings, and paranoia are the most common psychological effects of chronic use.
Symptoms increase with long-term use, and can involve paranoid delusions and hallucinations.
Violence and self-destructive behavior are common. Overdose is also a risk with crystal. Symptoms include fever, convulsions, and coma. Depends on dose and how the drug is administered. It Now Foundation.