FIELD REFERENCE
Full criteria & treatment guidance
Indications
- OCEMS SO-C-015 applies to adult/adolescent chest pain of suspected cardiac origin or suspected anginal-equivalent symptoms. Give aspirin in that pathway only when none of its listed exclusions applies; this is not blanket treatment for every chest-pain complaint.
Contraindications & local exclusions
- OCEMS SO-C-015: hold aspirin for direct midline mid-back pain suggesting aortic dissection (particularly with a hypertension history), anticoagulant or antiplatelet medication use as listed in the order, or reported aspirin allergy. The reference Bayer 81 mg chewable label separately excludes aspirin/pain-reliever/fever-reducer or ingredient allergy and use within 7 days after tonsillectomy/oral surgery unless directed by a doctor. Children/teens with or recovering from chickenpox or flu must not use that product because of the Reye’s syndrome warning. No routine pediatric cardiac aspirin regimen is authorized here.
Precautions
- The Bayer 81 mg chewable label warns of severe stomach bleeding; review ulcer/bleeding history, anticoagulants, steroids, other NSAIDs, alcohol and prior doses. The label advises against use in the last 3 months of pregnancy unless directed by a doctor. These general product warnings are separate from OCEMS treatment exclusions; confirm the actual product and patient.
- These are selected safety checks, not a complete prescribing monograph. Product labeling and OCEMS authorization answer different questions; confirm the actual product, patient population and applicable order.
Check before giving
- SO-C-015 withholds aspirin for reported allergy, anticoagulant/antiplatelet medication use, or direct midline mid-back pain suggesting possible aortic dissection.
- Apply the OCEMS contraindications as written; a general cardiac guideline from another jurisdiction may differ.
Use in OCEMS
- The 9-1-1 standing-order indication is adult/adolescent chest pain of suspected cardiac origin or an anginal equivalent.
- Obtain a 12-lead promptly; a normal tracing does not exclude serious ischemia.
Adult / adolescent
| Indication / route | Dose & limits |
|---|---|
| Suspected cardiac chest pain | Four 81 mg tablets (324 mg total) or one 325 mg tablet, once. SO-C-015 instructs the patient to chew. |
Pediatric
- A pediatric cardiac aspirin regimen is not provided in I-20. Do not scale down the adult chest-pain dose or present adult standing-order authority as pediatric authorization.
- Use the applicable pediatric assessment and base-directed care when cardiac disease is suspected.
Pediatric dosing availability
- OCEMS does not list a routine pediatric field regimen; do not scale an adult dose by weight.
| Weight | OCEMS pediatric dose |
|---|---|
| Any weight | No general OCEMS pediatric dose is listed; follow the applicable order or medical direction. |
Preparation & reassessment
- Ask specifically about medications already taken and document the amount administered.
- SO-F-02 separately lists aspirin for eligible firefighting personnel using package directions through an FS-ARN program; that is not a general pediatric or ALS dosing pathway.
UNDERSTAND THE CARE
Why local aspirin exclusions need an explicit medication history
The local chest-pain order defines both the indication and exclusions. A general ACS recommendation from another setting should not silently replace those instructions. Ask about medications already taken and document relevant anticoagulant or antiplatelet use, allergy and the symptoms that may raise concern for aortic dissection.
Applying the guidance
The adult instruction includes chewing the specified tablet amount. Verify the tablet strength and total dose rather than relying on a pill count alone. Continue the cardiac assessment, ECG and destination work; giving aspirin is not evidence that the cause of pain has been confirmed. The separate FS-ARN listing does not create pediatric or general BLS authority.
Diagram text & teaching checkpoints
- Indication
- Suspected cardiac origin or anginal equivalent.
- Exclusions
- Local allergy, medication and dissection checks.
- Product
- Tablet strength, chew instruction and prior doses.
- Ongoing assessment
- ECG, perfusion and destination.
Sources for this explanation
Original OCMedic teaching synthesis of the references below. Educational expansion updated ; this is not a new independent clinical-review date. Source-specific dates and limitations remain in the full guidance.
- I-15 — Adult / Adolescent Standing Order Drug Guide
- I-20 — Pediatric Medication Volume Dose by Weight
- SO-C-015 — Chest Pain of Suspected Cardiac Origin or Suspected Angina Equivalent Symptoms
- SO-F-02 — Over the Counter (OTC) Medications
- Reference product label — Bayer 81 mg chewable aspirin (orange) — product-specific label
Make the medication history specific
The local exclusions are easiest to apply when the history names the actual medicine. Ask what was taken, how much and when, then identify whether it falls into the anticoagulant or antiplatelet categories listed in SO-C-015. A statement such as “on a blood thinner” should be clarified when possible and passed on as uncertain when it cannot be resolved.
Similarly, preserve the nature of a reported aspirin allergy and the relevant pain history rather than reducing the entire screen to a checked box. The local concern for aortic dissection is part of treatment selection; a typical-looking chest-pain presentation does not erase an exclusion.
If aspirin is given, record the tablet strength and total amount, including medication taken before EMS arrival. If it is withheld, document the actual exclusion or uncertainty and communicate it with the cardiac assessment. The reason is more informative than “aspirin not given.” Continue ECG, perfusion and destination work under the chest-pain order; neither receiving aspirin nor being unable to receive it establishes the cause of symptoms.
Sources: SO-C-015