A 65-year-old patient with stable angina is prescribed sublingual glyceryl trinitrate (GTN) spray for symptom relief. What is the most important piece of advice regarding its mechanism of action and potential side effects?AIt prevents platelet aggregation and can cause bleeding.BIt reduces heart rate and can cause bradycardia.CIt dilates coronary arteries and systemic veins, and can cause headache and dizziness.DIt blocks calcium channels and can cause ankle swelling.EIt increases myocardial contractility and can cause palpitations.Check my answer