Which abbreviation corresponds to Sublingual?

• A. SL
• B. SQ
• C. IV
• D. IO

Answer: (A)

Recognizing route abbreviations is the key here. Sublingual means a medication is placed under the tongue for absorption through the oral mucosa, bypassing the stomach and liver. The standard abbreviation for this route is SL, so this is the correct match.

The other abbreviations correspond to different routes: SQ stands for subcutaneous (under the skin), IV stands for intravenous (into a vein), and IO stands for intraosseous (into the bone). They describe entirely different ways of delivering meds, which is why they aren’t correct for Sublingual.