What is a side effect of Sildenafil (Viagra)?

Sildenafil, commonly known by its brand name Viagra, is primarily used to treat erectile dysfunction and works by increasing blood flow to the penis. One of the known side effects of Sildenafil is its ability to lower blood pressure, which can lead to pulmonary hypotension. This effect occurs because the medication relaxes blood vessels, which can cause a decrease in systemic vascular resistance, resulting in lower blood pressure in the pulmonary circulation.

The implications of this side effect are significant, especially for patients who may already be taking medications for hypertension or those with existing cardiovascular issues. Understanding the effects of Sildenafil on blood pressure, particularly its potential to cause hypotension in the pulmonary vascular bed, is crucial for healthcare providers to monitor for adverse reactions and manage patient safety effectively.

Other options do not align with the pharmacological effects or common side effects of Sildenafil. For example, while chest pain may be associated with various cardiac conditions, it's not a typical side effect of Sildenafil. Respiratory distress can occur in various situations but isn't specifically linked to Sildenafil usage, and hypertension would be opposite to what Sildenafil typically causes, as it tends to lower blood pressure rather than raise it.