- Meth is taken orally, smoked, snorted, or dissolved in water or alcohol and injected.
- Because pleasure from the drug fades quickly, users often take repeated doses.
- Meth can be prescribed by a doctor to treat ADHD and other disorders.
The neurotransmitter dopamine is affected by meth
- Meth increases the amount of the neurotransmitter dopamine
- Dopamine is involved in reward, motivation, the experience of pleasure, and motor function.
- Since meth causes an increased amount of dopamine, users often feel a euphoric "rush" or "flash".
- The drug is excitatory since increased amounts of dopamine are released.