Which dosage form of nitroglycerin is typically used for immediate relief of angina?

The sublingual tablet form of nitroglycerin is specifically designed for immediate relief of angina attacks. When placed under the tongue, the sublingual tablet dissolves rapidly, allowing the nitroglycerin to enter the bloodstream quickly. This rapid absorption is critical during an angina episode, as it provides quick vasodilation to relieve chest pain by improving blood flow to the heart muscle.

In contrast, the transdermal patch provides a prolonged, steady release of nitroglycerin over an extended period and is primarily used for prevention rather than immediate relief. Oral tablets might take longer to dissolve and absorb, making them less effective for acute angina episodes. An intravenous infusion of nitroglycerin can be used in more severe situations, such as during a hospital stay, but it is not typically the first line for immediate relief outside a clinical setting. Hence, the sublingual tablet is the most effective choice for rapid action during an angina attack.