What is a common side effect of nitroglycerin tablets?

Nitroglycerin is commonly used to treat angina pectoris, a type of chest pain caused by low blood flow to the heart. One of the most frequent side effects of nitroglycerin tablets is headache. This occurs because nitroglycerin works by dilating blood vessels to improve blood flow, which can lead to increased intracranial pressure and result in a headache.

The dilation of blood vessels is beneficial for alleviating chest pain, but it also can activate the pain pathways in the head due to the changes in blood flow dynamics. Patients often report that these headaches can be quite bothersome, but they typically resolve on their own shortly after the medication is taken.

Understanding this side effect is crucial for healthcare providers and patients alike, as it allows for better management of symptoms and expectations during treatment with nitroglycerin. The other options do not typically arise as side effects of nitroglycerin therapy, making headache the most relevant response to the question.