Sildenafil (Viagra) is prescribed for erectile dysfunction. Which history would cause the nurse to question this prescription?

The use of nitroglycerin with sildenafil (Viagra) raises significant concerns due to the risk of severe hypotension. Sildenafil works by increasing blood flow to the penis through vasodilation, which can lower blood pressure. Nitroglycerin, a medication commonly used to manage angina and heart-related conditions, also causes vasodilation. When both drugs are taken together, they can lead to an additive effect that dramatically lowers blood pressure, potentially causing symptoms such as dizziness, fainting, or even more serious cardiovascular events.

This interaction makes it crucial for healthcare providers to carefully assess a patient's medication history before prescribing sildenafil. In patients using nitroglycerin, alternative treatments for erectile dysfunction should be considered to avoid these potentially dangerous side effects.