Drowsiness, paralysis, numbness, poor coordination, and reduced heart rate are common side effects of
a. stimulants
b. depressants
c. hallucinogens

The conditions listed above are common side effects of DEPRESSANTS. Depressants are drugs which slowed down the central nervous system an the brain. They are usually used to treat anxiety and sleep disorders. Other side effects of depressants include: slurred speech, impaired memory and judgement, lowered inhibition, etc.