Depressant substances reduce arousal and stimulation. They do not necessarily make a person feel depressed. They affect the central nervous system, slowing down the messages between the brain and the body.

Also, they can affect concentration and coordination. They slow down a person’s ability to respond to unexpected situations. In small doses they can cause a person to feel more relaxed and less inhibited.

In larger doses they can cause drowsiness, vomiting, unconsciousness and death.

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