Amphetamines are central nervous stimulants, barbiturates are
A
CNS stimulants
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B
No effect on CNS
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C
Hallucinogenic
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D
CNS depressants
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Solution
The correct option is B CNS depressants Barbiturates are drugs that act as central nervous system depressants. They can produce a wide spectrum of effects, from mild sedation to total anaesthesia. These drugs are sometimes used to help patients relax before surgery. Thus, the correct answer is option D.