Short-term effects
- "Rush"
- Depressed respiration
- Clouded mental functioning
- Nausea and vomiting
- Suppression of pain
- Spontaneous abortion
Long-term effects
- Addiction
- Infectious diseases, for example, HIV/AIDS and hepatitis B and C
- Collapsed veins
- Bacterial infections
- Abscesses
- Infection of heart lining and valves
- Arthritis and other rheumatologic problems
SOURCE: The National Drug Institute on Drug Abuse.