Anticoagulation Safety Basics
Keep patients on blood thinners safe — bleeding signs, adherence, interactions, and when to escalate.
Learning Objectives
- 1.Recognize signs of dangerous bleeding on anticoagulation.
- 2.Reinforce safe anticoagulant use and adherence.
- 3.Escalate bleeding and high-risk situations appropriately.
Purpose
Anticoagulants prevent strokes and clots but raise bleeding risk. Nurses are the front line for catching dangerous bleeding early and keeping patients safely on therapy.
What to ask
- •Which anticoagulant, dose, and are they taking it as prescribed?
- •Any bleeding: nosebleeds, gums, bruising, blood in urine/stool, black stools?
- •Falls or head injury?
- •New medications, supplements, or NSAIDs (interaction/bleeding risk)?
- •For warfarin: recent INR and diet changes?
Red flags — bleeding
- •Head injury or fall on anticoagulation (intracranial bleed risk).
- •Black/tarry or bloody stools, vomiting blood, coughing up blood.
- •Severe or uncontrolled bleeding; large/spreading bruising.
- •Severe headache, weakness, confusion (possible brain bleed).
Escalate
Major bleeding or any head injury/fall on anticoagulation is an emergency — direct to 911/ED and notify the provider. Don’t wait it out.
What meds/labs matter
- •Warfarin: INR monitoring, many food/drug interactions.
- •DOACs (apixaban, rivaroxaban, dabigatran, edoxaban): renal dosing, fewer interactions, no routine INR.
- •NSAIDs/aspirin add bleeding risk — flag new use.
- •Never advise stopping anticoagulation without the provider.
What to document & send the provider
- •Agent, dose, adherence, and any missed doses.
- •Bleeding type/severity, falls/head injury.
- •New interacting meds; recent INR if warfarin.
Patient education script
- •"Watch for unusual bleeding — black stools, blood in urine, or bruising that spreads. Call us, and for a bad bleed or a head injury, go to the ER."
- •"Don’t start new medicines or supplements without checking with us."
Spanish phrase
If you hit your head or have heavy bleeding, go to the emergency room right away.
Si se golpea la cabeza o tiene sangrado fuerte, vaya a la sala de emergencias de inmediato.
see seh gol-PEH-ah lah kah-BEH-sah oh TYEH-neh san-GRAH-doh FWER-teh, VAH-yah ah lah SAH-lah deh eh-mer-HEN-syas deh een-meh-DYAH-toh
Mini case
An apixaban patient calls: fell yesterday and hit their head, now has a worsening headache.
What now?
Show answer
Head injury on an anticoagulant with a worsening headache is a possible intracranial bleed — an emergency. Direct to 911/ED immediately and notify the provider. Do not reassure or schedule a routine visit.
Checklist
- Screened for bleeding and falls/head injury.
- Reviewed adherence and new interacting meds.
- Escalated major bleeding/head injury emergently.
- Reinforced not stopping therapy without the provider.