Sublingual nitroglycerin has which characteristic?

Sublingual nitroglycerin has which characteristic?

• A. It must be swallowed quickly for absorption
• B. It is absorbed through the oral mucosa and acts rapidly
• C. It requires intravenous access to be effective
• D. It should be taken with a large amount of water

Answer: (B)

Sublingual nitroglycerin works primarily because of how it's absorbed. When placed under the tongue, the tablet dissolves and is absorbed directly through the oral mucosa into the bloodstream, bypassing the liver. That direct, rapid entry into systemic circulation produces quick relief for acute angina, often within minutes. It doesn’t need to be swallowed, doesn’t require IV access, and water isn’t needed for effectiveness—just let it dissolve under the tongue. The fast onset is a direct result of avoiding first-pass hepatic metabolism, which would slow or reduce absorption if swallowed.

Sublingual nitroglycerin works primarily because of how it's absorbed. When placed under the tongue, the tablet dissolves and is absorbed directly through the oral mucosa into the bloodstream, bypassing the liver. That direct, rapid entry into systemic circulation produces quick relief for acute angina, often within minutes. It doesn’t need to be swallowed, doesn’t require IV access, and water isn’t needed for effectiveness—just let it dissolve under the tongue. The fast onset is a direct result of avoiding first-pass hepatic metabolism, which would slow or reduce absorption if swallowed.