Side effects

Loss of appetite

Increased heart rate, blood pressure, body temperature

Contracted blood vessels

Increased rate of breathing

Dilated pupils

Disturbed sleep patterns

Nausea

Hyperstimulation

Bizarre, erratic, sometimes violent behavior

Hallucinations, irritability

Tactile hallucination that creates the illusion of bugs burrowing under the skin, Anxiety and paranoia

Depression

Intense drug craving

Panic, Convulsions, seizures and sudden death from high doses (even one time)