A 65-year-old patient with a past medical history of hypertension and type 1 diabetes mellitus presents to the ED with 4 days of weakness, nausea and vomiting. He takes ramipril, hydrochlorothiazide, Lantus and Humalog. Lab results show a potassium level of 6.3. Which of the following is the least likely to be underlying cause of hyperkalemia in this case?

About the Author: Anton Helman

Dr. Anton Helman is an Emergency Physician at North York General in Toronto. He is an Assistant Professor at the University of Toronto, Division of Emergency Medicine and the Education Innovation Lead at the Schwartz-Reisman Emergency Medicine Instititute. He is the founder, editor-in-chief and host of Emergency Medicine Cases.