CBD for agitation.

I would discuss with her doctor as well. Recent article in The Week magazine shows concerns now with elders taking CBD--they believe recent studies show more heart attacks, strokes for them. As others have observed there are problems with medications.

There isn't a universally established dose for agitation since the research is still ongoing. The dosages and formulations of CBD used in clinical studies are very specific and given under strict monitoring.

It is like that because CBD inhibits certain enzymes that metabolise commonly prescribed drugs, like blood thinners, antiepileptics, antidepressants, antipsychotics, some heart medicines, antibiotics, etc.
So, if you inhibit their metabolism, the concentration of those drugs in the blood elevates, and the danger is real. It can be lethal. That is why you shouldn't experiment.

Talk to a doctor. This is not something to play with.

I recommend talking to the doctor - many of them are very open to CBD options now. But you want to be careful that you aren't mixing it with something prescribed that might be problematic. I know plenty of people who take Delta-8s or Delta-9s successfully but you always want to check with your doctor to make sure you aren't potentially doing more harm than good.