They can be taken through injection, swallowed or inhaled. Medically, these drugs can be used to control weight, or treat mild depression or fatigue. Included in this category are diet pills, cocaine, caffeine and nicotine.
Stimulants can bring a feeling of alertness and self confidence.
They are both natural and synthetic drugs which have a strong stimulating effect on the central nervous system. Amphetamines affect the body by releasing an excessive amount of adrenaline into the system. By speeding up body functions and stimulating action of the central nervous system, a feeling of well-being results. If abused through overdose, hallucination, semi-consciousness, insomnia and diarrhea can occur. Amphetamines can be dangerous because they can drive a user to do things beyond his or her physical limits.