Hi, but your doctor has prescribed the meds so isn't that what your sponsor means that they are Ok if for medical diagnosis ??
As to the meeting, I think perhaps your instincts are telling you that it is best not to bring this up.....perhaps they are serving you well ??
Maybe you could chat to others individually after the meeting about this and see what their feelings are. Maybe you could find someone with similar experience and have used meds in their recovery. Perhaps they could become your sponsor.
Just some thoughts