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5 votes
How do you call the chemical substances that have a calming effect?

1) hallucinogens

2) depressants

3) stimulants

4) narcotics

User Robertbeb
by
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1 Answer

4 votes
A depressant is the chemical substances that have a calming effect on people. They are also called sedatives or tranquilizers. The correct answer is 2. 
User Beets
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