Antipsychotic drugs such as Thorazine are often used to treat schizophrenia. Antipsychotic drugs are used as__. a. agonist to mimic the effects of serotonin . . b. agonist to mimic the effects of dopamine . . c. antagonist to inhibit the action of dopamine . . d. antagonist to inhibit the action of serotonin . . e. agonist to mimic the effects of GABA . .