Crystal meth users who inject the drug expose themselves to additional risks, including contracting HIV, hepatitis B and C, and other blood-borne viruses.What are the effects?Common immediate effects. *Euphoria *Increased energy and attentiveness *Diarrhea and nausea *Excessive sweating *Loss of appetite, insomnia, tremor, jaw-clenching *Agitation *Compulsive fascination with repetitive tasks *Tal