Psychoactive substance use disorders, Biology

PSYCHOACTIVE SUBSTANCE USE DISORDERS:

Drug: It is derived from a French word 'drogue'. A medical substance used in the treatment of disease. (Taber's  Dictionary). 

'Drug dependencelsubstance  dependence: A state psychic, sometimes also physical, resulting from taking a drug characterized by behavioural and other responses that always include a compulsion to take a drug on a continuous or periodic basis in order to experience  its psychic effects and sometimes to avoid the discomfort of its absence. Tolerance may or may not be present. 

Physical dependence: Physical dependence occurs when  the drug user's  body becomes so accustomed to a particular drug that slhe  can fundtion normally only if the drug is present  in  the body chemistry. 

Psychic Dependence:  Psychic or psychological  dependence occurs when the drug is central to a person's thought, emotions and activities. It is difficult for the person to stop thinking of  the drug which causes intense craving for it and its effect.  . 

Tolerance: It is 'an  adaptive state characterized by a diminished  response to the same quantity of a drug or by the fact that a larger dose is required to produce the same degree of pharmacodynamic effect'. (WHO Bulletin, 1965) 

Withdrawal:  It is an organic mental disorder following  cessation (stopping)  or reduction in the intake of a substance such as alcohol, an opioid, amphetamines, tobacco or sedatives that have previously been used regularly to induce intoxication.  

Posted Date: 10/27/2012 1:54:48 AM | Location : United States







Related Discussions:- Psychoactive substance use disorders, Assignment Help, Ask Question on Psychoactive substance use disorders, Get Answer, Expert's Help, Psychoactive substance use disorders Discussions

Write discussion on Psychoactive substance use disorders
Your posts are moderated
Related Questions
Explain the Pregnancy and Obesity? Obesity is associated with increased risk for gestational diabetes, hypertension, pre- eclampsia, perinatal mortality and the need for induce

The structure of leaves Borrow a microscope from another school, a doctor, or a hospital. Study the under- side of leaves and locate the breathing pores or stomata with the two

A biologist examines a series of cells and counts 140 cells in interphase, 10 cells in metaphase, 4 cells in anaphase and 7 cells in telophase. if complete cell cycle requires 24 h

Q. What is the difference between the exocrine gland and the endocrine gland? Endocrine gland is a gland whose secretions are called as hormones that are collected by the blood

A monohybrid cross: A.Determines the genetic makeup of an organism B.always involves homozygous alleles. C.always involves organisms that are heterozygous at all loci. D.Always inv

Q. What is the function of the right ventricle? To where does the right ventricle pump the venous blood? The venous blood is carried as of the right ventricle to the lungs by t

Q. Spoilage of Fish and other Sea Foods Fish and other marine foods are second only to meat and poultry as a staple animal food around the world. India is one of the important f

Explain the Source of Energy - Growth of Microorganism? Constant supply of energy is required to carry out cellular activities, like biosynthesis and degradation of macromolecu

What is the nature of the stimulus received and transmitted by the neurons? Neurons receive and transmit chemical stimuli by neurotransmitters released in the synapses. Along

Determine the term - Leuconoid sponge. The most complex of the three different sponge architectures. Choanocytes are found in chambers, and there is not any spongocoel. Water e