DRUG

 A drug is a chemical substance which when taken changes the body function.

DRUG ADDICTION

It is a condition of physiological and psychological dependence on certain drug due to repeated use of drugs for longer period.

Types of drug 

1.Psychotropic drugs -These drugs act on the brain and change behavior  and consciousness, 

Example-Antianxiety drugs ,Anti-psychotic drugs , Diazepam ,Nitrazepam ,etc .

2.Sedative -hypnotics - It is sedative drug. It reduces excitement ,pain and lowers the physiological activity, drowsiness and sleep ,

example - Thiopentone , Secobarbital ,etc .

3. Anti-depressants- these drugs elevate mood in depressive illness and phobic state 

Example - Monoamine oxidase inhibitor- A, monoamine oxidase inhibitor -B.

4. Antimanic drug -These drugs control mania .The abnormal psychological state of excitement . 

Example - Lithium 

5. Opiates narcotics - These are derived from opium . opium is a dried latex of unripe fruit of poppy plant  .

Example - Morphine , codeline ,

The synthetic opiates are hiroin ,pethidine methadone .

6. stimulants . These drug stimulates the nervous  system and make person more active .

Example - Caffeine , cocaine ,amphetamine 

7. Psychodelic drugs or hallucinogens 

These drugs change ones mood ,behavior and thought 

Example - LSD , mescaline ,psilocybin 

8. Hemp plant product - these drug contain THC which is used for hallucinogen 

Example - bhang , ganja , charas.