Human Diseases(Introduction)

Drug Abuse It is a physical and mental(psychological) dependence on drugs.Such drugs are habit formation and in most of the case the drawl is difficult. The chemicals which alter the functioning of the body is called drugs. The drugs which affect the nervous system are called psychotropic drugs. These can be divided in to two broad categories. Narcotics: They are depressants and decrease the activity of nervous system. Stimulants: They increases the activity of nervous system. They psychotropic drug on the basis of their action can be divided in to 4 groups. Sedatives and tranquillizers: e.g . Barbiturates(used in sleeping pills), Valium, Diazepam. They depress the nervous activity and produce relaxation and calmness. They are anti anxiety drugs. They sedative cause drowsiness and induce sleep. The tranquillizers are mood elevators and reduce tension. They do not induce sleep. Opiate narcotics:e.g. Opium, Morphine, Pathedine and Heroin etc. They are also depressants and are the derivative of opium which is obtained from the pods of poppy plants. They do not induce sleep but are used for their analgesic effect. The addicted perso develops euphoria. Heroine has been completely banned. It is 20 times more potent than opium. Heroine causes physical dependence and the withdrawal symptoms are fits and convulsion etc. Morphine is 10% more potent than Opium. The brown sugar is also a morphine derivative. Atropine, obtained from the leaves of Atropa belladona, is used by Opthalmologists to dialate the pupil and paralyze the accommodation. If given internally, it is antagonistic to Morphine and opium. A homeopathic medicine Belladona is also obtained from the roots and leaves of this plant and has strong affect on nervous system. Stimulants: e.g. Amphetamines, cocaine, caffeine, Methamphetamine. Hallucinogens: e.g. bhang, Charas, Ganja, Marijauna and LSD ETC.