laboratory values should be monitored closely? A. Serum potassium B. Liver enzymes C. Thyroid function tests D. Complete blood count Answer: A. Serum potassium Rationale: Loop diuretics can lead to hypokalemia, and ACE inhibitors can cause hyperkalemia. It is crucial to monitor serum potassium levels to prevent adverse effects. 2. A patient with type 2 diabetes mellitus has been prescribed metformin. Which of the following conditions is a contraindication for metformin therapy? A. Renal dysfunction B. Hypothyroidism C. Hypertension D. Hyperlipidemia Answer: A. Renal dysfunction Rationale: Metformin is contraindicated in patients with renal dysfunction due to the increased risk of lactic acidosis. 3. A 45-year-old female presents with acute migraine headaches. Which of the following medications is considered first-line therapy for her condition? A. Topiramate B. Sumatriptan C. Amitriptyline