A physical therapist notes the tendency of a patient to become dizzy and lightheaded with any positional change after starting a new medication. Which of the following medications would MOST likely produce the described side effects?
1. Furosemide (Lasix)
2. Clopidogrel (Plavix)
3. Warfarin (Coumadin)
4. Simvastatin (Zocor)