My mom is in an assisted living. She is 91 and in pain for a host of issues and has anxiety. The Psychologist prescribed an SSRI. I know they have a host of side affects and neither my mother nor I want her on any SSRI at this age. If she was younger yes, but not at 91. I feel there are other drugs that could be prescribed. Can I as her Medical POA say no to the SSRI? Can I ask the pharmacist not to fill the prescription?