What are the current NICE guidelines for the initiation of anticoagulation therapy in patients with atrial fibrillation?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 14 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

According to NICE guidelines, anticoagulation should be considered for stroke prevention in patients with atrial fibrillation based on their stroke and bleeding risk profiles, using the CHA2DS2-VASc score for stroke risk assessment and the ORBIT score for bleeding risk assessment .

For most people with a CHA2DS2-VASc score of 2 or above, NICE recommends offering a direct-acting oral anticoagulant (DOAC) as first-line treatment, including options such as apixaban, dabigatran, edoxaban, and rivaroxaban .

If a DOAC is contraindicated, not tolerated, or not suitable, warfarin (a vitamin K antagonist) should be offered, with appropriate referral for initiation and monitoring .

Anticoagulation should not be withheld solely based on age or falls risk, and treatment decisions should involve shared decision-making considering the benefits and risks, personal preferences, and clinical factors .

Educational content only. Always verify information and use clinical judgement.