Pharmacology You decide not to prescribe Sildenafil in a patient because the patient is on an antianginal drug. Which of the following can it be? A Calcium channel blockers B Beta blockers C Organic nitrates D ACE inhibitors 💡 Explanation You decide not to prescribe Sildenafil in a patient because the patient is on an antianginal drug. Which of the following can it be? ✓ Correct Answer: C. Organic nitrates