I am taking lisinopril and was just prescribed spironolactate. both of these raise potassium levels. (i also take atovastatin). i am scheduled for eye surgery next week. is it safe to take both of the potassium-elevating drugs, and have surgery?

Routine surgery would include pre-operative testing of your current blood status before the procedure would proceed. That would detect whether there is any significant problem of your potassium that would preclude during the procedure safely. Please clarify this with the doc.

If your kidney function is normal or almost normal, a combination of lisinopril and spironolactone does not always cause hyperkalemia. Furthermore, eye surgery is done with local anesthetic so there will be no problem even if you have mild hyperkalemia. You are fasting before the procedure so no K intake but your kidneys are still excreting K in the urine so K won't get higher perioperatively.