Serious health problems include liver and heart disease. Stimulants Stimulants increase the action of the central nervous system. Tolerance, psychological and physical dependence develops. Continued high doses cause heart problems. Malnutrition, and death B. Cocaine or Crack rapidly produces addiction and causes confusion, depression, and hallucinations.
Effects are unpredictable-convulsions.
Coma, cardiac arrest and death are possible. Nasal membranes may be destroyed. Smoking causes lesions in the lung. Brain damage may occur. V. Depressants Depressants relax the central nervous system.