The drugs interact on a wide range of neuroreceptors and often have antidopaminergic? effects. the range of interacts produce many different adverse effects of extrapyramidal reactions, including acute dystonias (spasms of the face, neck and back), akathisia (motor restlessness), rigidity and tremour, tardive dyskinesia, tachycardia, hypotension, impotence, lethargy, seizures and on and on.
Drugs used as antipsychotics include the three groups of phenothiazines, thioxanthenes, diphenylbutylpiperidines, substituted benzamides, ioxapine (tricyclic dibenzoxazepine), clozapine (dibenzodiazepine) and oxypertine.