Physical Effects of Meth and Amphetamines

Meth and amphetamines are stimulants, and people in the "high" stage of the drug have excited speech and increased physical activity, which may include compulsively cleaning or disassembling mechanical devices (even cars). They may also have high blood pressure, nausea, chest pain, diarrhea, and fever.

As the high wears off, the user may suffer withdrawal symptoms including weakness and shaking, difficulty breathing, hallucinations, and aggressive behavior.

Over time, an untreated meth addiction can lead to heart and neurological problems, psychosis, poor skin condition, sexual dysfunction, and a weakened immune system. One common symptom is "meth mouth," rapid and severe tooth decay common among meth users. Addicts often grind their teeth, consume sugared sodas to quench drug-induced thirst, and practice poor oral hygiene. Dental treatment of meth users has become a significant expense for some public health and prison systems.