Commonly abused drugs are alcohol, marijuana, and cocaine. When a person can no longer control the use of a drug the person is an addict. The amount of the drug the addict feels the need to take becomes larger and larger. When a quantity of a drug taken is greater than the body can metabolize an overdose occurs. A diebetic is a person whose pancreas does not produce enough insulin.
Prescription drugs are drugs that can only be obtained with written premission from a doctor.
The nervous system receives and then responds to stimuli inside and outside your body.