The compound that causes general antidepressant action on the central nervous system belongs to the class of _____________.
(i) analgesics
(ii) tranquillizers
(iii) narcotic analgesics
(iv) antihistamines
Analgesics are used for pain-relieving purposes, but tranquilizers are the drug category used to treat the imbalanced neurotransmitter present in the brain. Therefore, option (ii) tranquilizers are the right answer.