Should elderly take benztropine to help with td (mouth movements) side effects of antipsychotics?

Orofacial dyskinesia: No. All medication, including benztropine comes with a additional risk of even more side effects. It has been difficult to eradicate these movements after administration of many medications, including antipsychotics and some GI meds. And they often persist despite discontinuation of the meds. While annoying and often frightening to the uninformed, they are rarely of clinical signficance.

Maybe: Tardive dyskinesia(td) is an unfortunate side effect of long term treatment with antipsychotics. Benztropine may help with the tremors, but generally is poorly tolerated in the elderly due to sedation, confusion, constipation, etc. It is usually avoided if possible in the elderly.

Cogentin (benztropine): I would use cautiously due to excess anticholinergic effects such as constipation or bowel obstruction or delirium. Alternatives can be Artane, Kenadrin or Amantadine.