What should be done to the site before applying nitroglycerin ointment?

Before applying nitroglycerin ointment, it is essential to ensure that the site is free of hair and scar tissue. This is important because hair or excessive scar tissue can impede the absorption of the medication into the bloodstream, which is crucial for the medication to exert its effects. A clean and unobstructed surface allows for optimal penetration of the ointment, ensuring the patient receives the intended therapeutic benefits.

Additionally, preparing the skin by making sure it is smooth and free of these barriers not only enhances absorption but also minimizes the risk of irritation and ensures a more precise dosage at the application site.