I too am taking Toprol XL 100 mg for IST and
not for blood pressure... Works great for the rhythm issue but I am bottoming out at 92/48, 95/52, and
etc. The doctors have seen me this way. I can't get out of bed in the night and
must use a bed pan. The best I have ever used for Tachy was bystolic
2.5 mg 2x's a day, but then for some odd reason that the doctor's could never figure out was sending my BP through the roof 168/115 range.