Warfarin: Frequency of monitoring

Maintenance Therapy

  • Dose held today in patient with significant over anticoagulation:                   In 1 - 2 days
  • Dosage change today:                                                                                   Within 1 - 2 weeks
  • Dosage change < 2 weeks ago:                                                                     Within 2 - 4 weeks
  • Routine follow-up of medically stable & reliable patients:                               Every 4 - 8 weeks
  • Routine follow-up of medically unstable or unreliable patients:                       Every 1 - 2 weeks

After Hospital Discharge

  • if patient or therapy is unstable:                                                                                in 1-3 days
  • if patient or therapy is stable:                                                                                     in 3-7 days