Which route would be used to bypass the digestive system in favor of rapid onset through nasal mucosa?

• A. Intranasal
• B. Sublingual
• C. IV
• D. PO

Answer: (A)

Absorbing a medication through the nasal mucosa provides rapid systemic absorption because the nasal tissues are highly vascular and deliver the drug directly into the bloodstream, bypassing the digestive tract and hepatic first-pass metabolism. This makes the intranasal route ideal for quickly achieving therapeutic effects when IV access isn’t available, while still avoiding digestion and first-pass processing.

Sublingual administration also bypasses the digestive system, but it does so under the tongue, not through the nasal passages. Intravenous injection bypasses the digestive system even more directly, but it does not use the nasal mucosa. Oral administration must travel through the GI tract and is subject to first-pass metabolism, leading to slower onset.