The effects of meth depend on whether the drugs are taken on a long term or short term bases.

Short term meth side effects may include:
1. Dilated pupils
2. Decreased fatigue
3. Increased activity
4. insomnia
5. Euphoria
6. Increased attention
7. Euphoric rush or “flash”
8. Increased respiration
9. Decreased appetite
10. Diarrhea, nausea
11. Irregular heart beat
12. Increased body temperature
13. Jaw clenching
14. tremors
15. Increases libido
16. Sexual climax problems

Long term meth side effects may include:
1. Psychosis and Paranoia
2. Hallucinations and Delusions
3. Obsessive compulsive behavior
4. Damage to brain
5. Memory loss
6. Aggressive or Violent behavior
7. Meth mouth
8. Anorexia
9. Mood instability
10. Brain damage/ Meningitis (Neurotoxicity)
11. Formication (sensation of flesh crawling with bugs, with possible associated compulsive picking and infecting sores)
12. Paranoia, delusions, hallucinations
13. Rhabdomyolysis (Muscle breakdown) which leads to kidney failure