What is the correct positioning for nitroglycerin spray usage for angina?

The correct positioning for nitroglycerin spray usage for angina is under the tongue. This method allows for rapid absorption of the medication into the bloodstream through the sublingual tissues. Nitroglycerin works by dilating blood vessels, which helps to relieve the chest pain associated with angina by improving blood flow to the heart.

Using the spray under the tongue maximizes its effectiveness, as it bypasses the gastrointestinal tract and offers quick relief. Other applications, such as in the cheek or on the forehead, may not provide the same prompt therapeutic effect and are not standard practice for nitroglycerin administration. Inhaling the spray through the mouth is also not advisable, as the sublingual route has been specifically designed for its pharmacological efficacy in treating angina.