Doctor: It's called tachycardia dyspensia. It's a side effect of long-term anti-psychotic use. I know it sounds counterintuitive, but sometimes increasing the dosage can help.
Peter: What about taking her off the medication altogether?
Doctor: We could do that, but your sister is severely psychotic. Last time she went off her meds, she attempted suicide.
Peter: Whatever you think is best.
Doctor: I can't make this decision for you. Your father gave you the power of attorney to make decisions like this.