What routes are commonly authorized for naloxone in EMS standing orders?

• A. Intramuscular or intravenous; sometimes intranasal per protocol
• B. Oral
• C. Subcutaneous only
• D. Topical

Answer: (A)

Naloxone needs to reach the bloodstream quickly to reverse opioid effects, so EMS standing orders favor routes that deliver the drug fast and reliably. Intramuscular and intravenous administration provide rapid, predictable onset in the field. If an IV line is already in place, the IV route offers the fastest reversal; when IV access isn’t readily available, intramuscular injection is a practical, swift alternative. Some EMS systems also authorize intranasal naloxone under the protocol because it can be given quickly without needles, which is especially useful when IV access is challenging or to reduce exposure risk.

Oral administration is not suitable in an overdose due to poor, unreliable absorption and a delayed onset, and topical forms aren’t effective for rapid reversal. Subcutaneous use is not typically listed as a standard option in many EMS standing orders. Therefore, the commonly authorized routes are intramuscular or intravenous, with intranasal available if the protocol allows.