I took nortyptiline but a doctor had me stop because I was having rapid heart rate with it. Can she or you take her pulse and see if it's fast? I also felt something like a zombie on that medication as well, I recall. I think she should take it easy, not getting up much and Monday, call the doctor about discontinuing the medication.
oops- it looked like you had posted this today before I responded! I hope she's already discontinued the medication then!