ABSTRACT
Pharmacology is the study of the chemical and physical properties of drugs; the effects of drugs on body chemistry, physiology and behavior; the mechanisms of action; the movement of drugs into, around, and out of the body; and their use in the treatment of medical disorders. Drugs that are prescribed primarily for their effect on mood, thought processes, and behavior are collectively referred to as psychotropic drugs. Stimulants are among the most frequently prescribed psychotropic drugs for children and are used primarily for the management of hyperactivity. Psychotropic drugs are usually taken orally. This is the oldest and easiest route of drug administration. To be absorbed, drugs in tablet or capsule form must dissolve in the fluids of the stomach and intestine. Drug molecules then pass through the cells that line the wall of the digestive tract and into the capillaries of the veins that lead from the stomach and gut to the liver.
