What is a critical action to take when administering nitroglycerin tablets?

Administering nitroglycerin tablets under the tongue is a critical action because this method allows for rapid absorption into the bloodstream. The sublingual area has a rich blood supply, which facilitates quick delivery of the medication, enabling it to alleviate chest pain or angina effectively and within minutes. This approach is vital since nitroglycerin works best when it is absorbed sublingually, bypassing the digestive system and avoiding delays in therapeutic effects.

Other methods, such as giving the tablet with water, crushing the tablet, or placing it on the cheek, would hinder the efficacy of the medication. Water could dilute the medication and slow absorption; crushing the tablet could destroy its intended form of action and alter how quickly it works. Placing it on the cheek may not provide the optimal blood flow needed for effective absorption. Thus, placing the tablet under the tongue ensures the most efficient and effective treatment for the patient experiencing angina attacks.