The nurse is visiting a 78-year-old client in the home. The client has type 1 diabetes mellitus, hypertension, and osteoarthritis in both knees. The client’s sight is moderately impaired despite the use of eyeglasses. The client’s medication regimen includes Humulin insulin 70/30 (combination insulins) 35 units subcutaneously in the morning, lisinopril (Zestril) 5 mg by mouth daily, and nabumetone (Relafen) 500 mg by mouth twice daily. What are 2 important medication safety issues the nurse will assess in the client? What measures can the nurse suggest to the client to ensure accuracy and compliance with the medication regimen? The client reports feeling “dizzy” at times. How will the nurse evaluate this concern?