Which category do the following drugs belong to: chlorpromazine, clozapine, loxapine, olanzapine, perphenazine, thioridazine, trifluoperazine?

Which category do the following drugs belong to: chlorpromazine, clozapine, loxapine, olanzapine, perphenazine, thioridazine, trifluoperazine?

• A. Antipsychotics with strong anticholinergic properties
• B. First-generation antipsychotics
• C. Second-generation antipsychotics
• D. All antipsychotics (except quetiapine, clozapine, pimavanserin) - Avoid.

Answer: (A)

Antipsychotics often carry anticholinergic effects that can influence both their side-effect profile and tolerability. The drugs listed include several agents known for notable anticholinergic activity (for example, chlorpromazine and thioridazine among the older phenothiazines, and clozapine among the atypicals), with others like olanzapine and loxapine also contributing to anticholinergic burden. While the degree of anticholinergic activity varies across these drugs, the common thread is a clinically meaningful anticholinergic effect, which makes describing them as antipsychotics with strong anticholinergic properties the best overall fit. The categories based on generation or a blanket “all antipsychotics” label don’t accurately capture this shared pharmacologic characteristic.

Antipsychotics often carry anticholinergic effects that can influence both their side-effect profile and tolerability. The drugs listed include several agents known for notable anticholinergic activity (for example, chlorpromazine and thioridazine among the older phenothiazines, and clozapine among the atypicals), with others like olanzapine and loxapine also contributing to anticholinergic burden. While the degree of anticholinergic activity varies across these drugs, the common thread is a clinically meaningful anticholinergic effect, which makes describing them as antipsychotics with strong anticholinergic properties the best overall fit. The categories based on generation or a blanket “all antipsychotics” label don’t accurately capture this shared pharmacologic characteristic.