Emergency Card for Blood Thinners: What to Include

If you take an anticoagulant or antiplatelet drug, a fall that would be a bruise for most people is a potential internal hemorrhage for you. A minor fender-bender becomes a possible bleeding emergency. A routine dental extraction requires coordination between your dentist and your prescribing doctor. This is the reality for the millions of people on blood thinners — and it's the reason an emergency card matters more for this group than for almost any other.

Paramedics are trained to ask about anticoagulants early in their assessment. The American College of Emergency Physicians notes that anticoagulant status is one of the highest-priority medication details in trauma because it changes bleeding management, imaging urgency, and whether the receiving hospital needs to prepare a reversal agent before you arrive. A card that communicates this in seconds — without relying on the patient being conscious or coherent — is one of the simplest things you can do to protect yourself.

This guide covers exactly what to write on the card. If you want to skip ahead and print one now, the free card generator takes about three minutes and works on any device.

Why blood thinners need their own card section

Blood thinners are not one drug — they're at least six commonly prescribed medications that work through different mechanisms, have different half-lives, and require different reversal strategies. Writing "blood thinner" on a medical card is like writing "heart pill" — it tells the ER team you have a problem without giving them what they need to solve it.

The stakes are specific. The American Heart Association identifies anticoagulant-related bleeding as a leading cause of drug-related emergency department visits, particularly among older adults. The FDA has issued multiple safety communications about the importance of correct identification and reversal of specific anticoagulants in emergency settings. When a patient on warfarin arrives at a trauma center with a head injury, the treatment protocol is fundamentally different from the same patient on apixaban — the reversal agent, the dosing, the urgency of imaging, and the decision about surgery all change based on the specific drug.

This is why a generic medical ID card isn't quite enough for people on blood thinners. You need a card that names the drug, the dose, and — for warfarin users — your latest INR. The rest of this guide walks through each field.

What to put on a blood thinner emergency card

1. The drug name — brand AND generic

Write both names. Hospitals use generic names in their systems; patients and pharmacies often use brand names. Listing both prevents any confusion when seconds matter. The most commonly prescribed blood thinners and their generic equivalents:

• Warfarin (brand: Coumadin, Jantoven)
• Apixaban (brand: Eliquis)
• Rivaroxaban (brand: Xarelto)
• Dabigatran (brand: Pradaxa)
• Clopidogrel (brand: Plavix)
• Enoxaparin (brand: Lovenox)

Write the name exactly as it appears on your prescription bottle. Spelling matters here — "rivaroxaban" and "rivarelbran" are different enough to cause a delay if someone has to decode your handwriting.

2. Dose and frequency

The dose tells the ER team how anticoagulated you are. Examples that work well on a wallet card:

• "Eliquis (apixaban) 5 mg twice daily"
• "Warfarin (Coumadin) 5 mg once daily at 6pm"
• "Xarelto (rivaroxaban) 20 mg once daily with dinner"
• "Plavix (clopidogrel) 75 mg once daily"

If you take a reduced dose (e.g. Eliquis 2.5 mg instead of 5 mg due to kidney function or age), write the actual dose you take. The reduced dose is clinically meaningful and affects reversal decisions.

3. Latest INR and date tested (warfarin users)

This applies only to warfarin. The INR (International Normalized Ratio) measures how effectively your blood clots. Most people on warfarin for atrial fibrillation or venous thromboembolism target an INR between 2.0 and 3.0, though mechanical heart valve patients may target higher. The Mayo Clinic explains that an INR above the therapeutic range significantly increases bleeding risk, while an INR below it increases clot risk.

Write it like this: "INR 2.6 — tested 4 Jun 2026". The date is critical. An INR from last week is useful; an INR from three months ago is stale and the ER will likely re-test before making decisions. But even a dated value gives them a starting point and tells them you're being actively monitored.

If you take a DOAC (Eliquis, Xarelto, Pradaxa) instead of warfarin, skip the INR line entirely. DOACs don't require INR monitoring. Instead, note the time of your last dose if you can keep that current — it helps the team estimate residual anticoagulant activity.

4. Prescribing doctor and phone number

The doctor or clinic that manages your anticoagulation — whether that's a cardiologist, hematologist, or your GP running a warfarin clinic. Hospitals will call them for guidance on whether to hold, reverse, or continue your medication based on the clinical situation. Write the name and a phone number that reaches someone during business hours (and ideally has an on-call service after hours).

5. Reversal agent awareness

You don't need to prescribe your own reversal agent — that's the ER doctor's job. But noting which reversal applies to your drug helps the receiving hospital prepare before you arrive:

• Warfarin: reversed with vitamin K (phytonadione) and 4-factor prothrombin complex concentrate (4F-PCC). The FDA has approved 4F-PCC products specifically for urgent warfarin reversal.
• Pradaxa (dabigatran): reversed with idarucizumab (brand: Praxbind), an FDA-approved monoclonal antibody fragment that specifically binds and neutralises dabigatran within minutes.
• Eliquis (apixaban) and Xarelto (rivaroxaban): reversed with andexanet alfa (brand: Andexxa), FDA-approved for factor Xa inhibitor reversal in life-threatening or uncontrolled bleeding. Where andexanet alfa is unavailable, 4F-PCC is used off-label.
• Plavix (clopidogrel): no specific reversal agent. Platelet transfusion may be considered in severe bleeding, but the evidence is mixed. The key information for the card is the drug name itself.

A practical way to include this on the card without taking too much space: "Pradaxa (dabigatran) 150 mg BID — reversal: idarucizumab (Praxbind)". One line, high signal.

6. Other blood-affecting drugs — especially aspirin

Many people on anticoagulants also take aspirin or another antiplatelet drug. Dual antithrombotic therapy — for example, an anticoagulant plus aspirin after a cardiac stent, or dual antiplatelet therapy with clopidogrel plus aspirin — substantially increases bleeding risk. The American Heart Association has published specific guidelines on managing patients on combined antithrombotic therapy, precisely because the bleeding profile is so different from a single agent.

If you take any combination like this, list every blood-affecting drug on the card, clearly grouped:

• "Eliquis (apixaban) 5 mg BID + Aspirin 81 mg daily"
• "Plavix (clopidogrel) 75 mg daily + Aspirin 325 mg daily — post-stent (placed March 2026)"

7. The reason you take it (briefly)

One or two words after the drug name:"Warfarin — atrial fibrillation" or "Xarelto — PE history (2024)". The reason matters because it influences whether the ER team can safely pause your anticoagulant. Someone on warfarin for a mechanical mitral valve cannot have their anticoagulation stopped without bridging; someone on Xarelto for a one-time provoked DVT from two years ago has more flexibility. That single word of context changes the risk calculation.

8. Standard emergency card fields

Everything else that belongs on any good emergency card still applies: your full name, date of birth, drug allergies (in capitals), other medical conditions, emergency contact with a phone number that actually gets answered, and a date-of-last-review line so responders know the card is current. For the full general checklist, see our complete medical ID card guide.

What paramedics do differently when they see a blood thinner card

The card doesn't just inform — it changes the clinical workflow. When a paramedic finds a card listing an anticoagulant, several things shift immediately:

• Heightened bleeding assessment. Any trauma — even a seemingly minor fall — gets a more thorough check for signs of internal bleeding. Abdominal tenderness, worsening headache after a head bump, expanding bruising — all of these get more weight in a patient on blood thinners. The American College of Emergency Physicians recommends a lower threshold for CT imaging in anticoagulated patients with head trauma, even if the patient appears well initially.
• Early hospital notification. Paramedics radio ahead to the receiving ED with the anticoagulant name and dose so the hospital can begin preparing the reversal agent before the patient arrives. For agents like andexanet alfa, which may need to be brought from the pharmacy, those extra minutes matter.
• Adjusted trauma assessment. In the ABCDE primary survey, the Circulation step gets extra attention. Anticoagulated patients can bleed significantly into body compartments (abdomen, thigh, retroperitoneum) without obvious external signs. Tachycardia and dropping blood pressure may develop later than in a non-anticoagulated patient because the bleeding is internal and ongoing.
• Transport priority. An anticoagulated patient with any mechanism suggesting bleeding may be triaged to a higher-level trauma center rather than the nearest community ED, because reversal agents and surgical backup need to be immediately available.

None of this happens without the paramedic knowing the drug name. An unconscious patient with a wallet card that says "Pradaxa (dabigatran) 150 mg BID — AFib — reversal: idarucizumab" gets a meaningfully different response than an unconscious patient with no medical information at all.

Common mistakes on blood thinner cards

After looking at what works, here are the errors that undermine the card's usefulness:

• Writing "blood thinner" without the drug name. This is the most common and most consequential mistake. "Blood thinner" tells the team you bleed more. "Apixaban 5 mg BID" tells them which reversal agent, what half-life to expect, and whether an INR test is even relevant. Always name the drug.
• Stale INR values. For warfarin users, an INR tested months ago may be actively misleading. If your INR has shifted from 2.5 to 4.0 since the card was written, the ER team is working from wrong data. Update the INR every time you get tested. If that feels like a hassle, pencil it in lightly so you can erase and rewrite, or use a card you can reprint easily — the free generator makes reprinting trivial.
• Not listing aspirin or other antiplatelets. People often think of aspirin as "just aspirin" and leave it off the card. But aspirin on top of an anticoagulant changes the bleeding profile significantly. Every blood-affecting medication belongs on the card, including low-dose aspirin.
• Missing the prescribing doctor's phone number. The ER will want to consult your anticoagulation prescriber about whether to hold, bridge, or reverse. A card with the drug name but no way to reach the managing doctor leaves the ER team guessing about your broader treatment plan.
• No date-of-last-review on the card. A card with no date could be six months old or six years old. A simple "Reviewed Jun 2026" line tells the ER the information is current and trustworthy.

Wallet card, fridge card, or both

A wallet card goes where you go — it's what works when you collapse at the grocery store or get into a car accident. A fridge card is what paramedics find when they arrive at your home, which is standard EMS practice in the US, UK, and Canada (the Vial of Life protocol). The fridge card has more space for details like full medication lists, multiple doctor contacts, and care preferences.

For someone on blood thinners, both formats are worth having. The wallet card carries the essential line — drug name, dose, INR if applicable, reversal agent — while the fridge card can include the full medication list, the anticoagulation clinic contact, and the indication. The free generator creates both from a single set of details, plus a combined letter-sized PDF for extra copies.

For patients with cardiac conditions alongside their anticoagulant, our heart condition emergency card guide covers how to phrase device info (pacemakers, ICDs, stents) and cardiac-specific details on the same card.

Frequently asked questions

Print your free blood thinner emergency card

The free card generator produces a wallet-sized and fridge-sized PDF with space for your anticoagulant name, dose, INR, prescribing doctor, and emergency contacts. It takes about three minutes, runs entirely in your browser, and stores nothing on any server. Your medical information stays on your device and on the card you print.