Single doses can impair cognitive functioning, learning, and motor abilities. Panic reactions can also be produced. Possible depression of the immune system, chromosone damage, reduced sperm count in males. Effective analgesics which also cause dependence. Single doses can produce impairment cognitive and motor functioning, and fluctuation in mood and awareness.
Higher doses can cause resporatory arrest.
Withdrawal can also cause restlessness, tears, diarhea, abdominal cramps, goosebumps, and a runny nose. Tolerance can develop to many of the desired effects and users must increase the dose in order to have the same effect. Increase blood pressure, muscular weakness, trembling, nausea, chills, impaired motor skills and coordination. Significant effects on perception, thought and mood. Rapid swings in mood and unpredictable changes in emotions and sensations.