Does Bystolic affect potassium levels or any other nutrient levels? I am 51 years old female, 113 lbs and normally in very good health. Under much stress lately and having some blood pressure issues for first time ever. Dr put me on Bystolic 2.5mg and all seems fine but reading reviews of meds people complain of leg cramps ~ I d like to be a little more imformed about what affects Bystolic has on depleting certain nutrients.