Drug is defined as a chemical compound used for diagnosis or therapy or as a preventive measure.The three main drug groups are:
Depressants
Stimulants
Hallucinogens
1)Depressants:It includes alcohol,benzodiazepines and barbiturates .
It acta as a depressant ,sedative and hypnotic
It is also use to treat seizures
2)Stimulants:Stimulants includes substances such as amphetamines ,cocaine and crack.
It act on the brainstem amd medulla to stimulate respiration
It is also used as afjunctive therapy for exogenous obesity
3)Hallucinogens:It includes substances such as lysergic acid diethylamide,mescaline,psilocybin.
It helps tomanage behavior as well as mood.
It helps to reduces stress
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