Check before giving

Do not use for a wide, irregular rhythm.
PR-115 specifically identifies IO administration as ineffective for adenosine; this pathway is rapid IV.

Use in OCEMS

For a regular narrow-complex tachycardia with a pulse. The adult SO-C-025 pathway distinguishes mild symptoms from hemodynamic instability.
For mild symptoms at a rate of at least 150/min, attempt Valsalva before the medication pathway.

Indication / route	Dose & limits
Regular narrow-complex tachycardia ≥150/min	12 mg rapid IV. If the rhythm persists, repeat 12 mg once after 3 minutes.
Unstable presentation	Follow the synchronized-cardioversion branch of SO-C-025; do not delay urgent electrical treatment to complete a medication sequence.

I-20 marks pediatric adenosine as requiring a base hospital order. It provides separate first- and second-dose rows for each weight band.
Use the ordered dose and the matching weight-band chart; do not apply the adult 12 mg initial dose to a child. I-20 uses a 3 mg/mL preparation.

I-20 pages 1–10: base hospital order required. Rapid IV route; preparation 3 mg/mL. PR-115 states adenosine is not effective through an IO site.
These are the published I-20 band doses, not exact-weight calculations. Confirm the actual order and prepared volume against the linked chart; do not extrapolate outside its listed bands.

Record the rhythm before and after administration and reassess perfusion and symptoms.
Confirm the actual syringe concentration and dose. A vial or syringe size is not the ordered dose.