This document presents a case study of an 83-year-old female patient admitted to the ICU with complaints of severe body pain and inability to walk for the past 10-12 days. Her medical history includes recurrent UTIs, hypertension, hysterectomy and colon cancer. Laboratory tests revealed anemia and hyperkalemia. She was prescribed various medications to treat her conditions. The clinical pharmacist intervened regarding concurrent use of spironolactone and telmisartan due to risk of hyperkalemia and provided patient education.