Answer:
D. dangerously slowed breathing.
Explanation:
Depressants are drugs that reduce the symptoms of mental illness. Some of them, such as barbiturates, are used as sedatives and sleeping pills. Drugs that receive this name include Zyprexa, Seroquel, Haldol, Xanax, Klonopin, Halcion and Librium. An important consequence of depressant use is dangerously slowed breathing.