Step 1: Understanding the Concept.
The formulation chosen for a drug is driven by how fast it needs to work and how it can avoid being broken down before reaching its target.
Step 2: Key Approach.
Think about nitroglycerin's clinical use, immediate relief of angina, and match that urgency to a tablet type built for rapid absorption.
Step 3: Detailed Explanation.
Angina pain needs to be relieved within minutes, which rules out CR tablets since their whole design principle is to slow drug release rather than speed it up.
Bolus and effervescent tablets are meant for entirely different purposes, large animal dosing and drink-based dissolution respectively, and neither matches an emergency human cardiac formulation.
Placing Nitrostat under the tongue lets nitroglycerin dissolve almost immediately and enter the bloodstream through the oral mucosa, skipping the liver's first-pass metabolism that would otherwise destroy much of the dose.
This fast, direct absorption route is why Nitrostat is formulated as a sublingual tablet.
Step 4: Final Answer.
Nitrostat® is an example of a sublingual tablet.