Problem: Tristan, a 65-year-old male, comes to the clinic complaining of muscle pain for the past six months. The muscle pain started suddenly in his arms and legs and occurred throughout the day. He denies any recent injury or trauma. He is currently taking 80 mg PO pravastatin once daily. His vital signs are as follows; blood pressure 130/80 mmHg, heart rate 68 beats/min, respiratory rate 18 breaths/min and temperature 98.6 F. Upon conducting a physical exam, tenderness on palpation is noted in his upper and lower extremities bilaterally, strength and sensation are intact. He denies any chest pain or shortness of breath. What is the next step in management?
- Platelet count
- Mean corpuscular volume
- Total blood cholesterol
- Creatine kinase (CK)