What to do if you miss a dose of Coumadin

Missing a dose of Coumadin (Warfarin) is common — most people will skip a dose at some point during a course. The right action depends on how long since the missed dose and whether Coumadin is taken event-driven or daily at 1mg, 2mg, 2.5mg, 3mg, 4mg, 5mg, 6mg, 7.5mg, 10mg. The wrong action — doubling up — is not recommended.

For daily Coumadin

If Coumadin is taken daily for a chronic condition, take the missed dose as soon as you remember, unless it is almost time for the next scheduled dose. In that case skip the missed dose and continue normally. According to the prescribing information for Warfarin, two doses should never be taken close together to "make up" for a miss.

For event-driven Coumadin

If Coumadin is used as needed (not on a fixed schedule), there is no "missed dose" in the conventional sense — simply take the planned dose when needed and observe the recommended gap before re-dosing. Warfarin inhibits vitamin K epoxide reductase complex 1 (VKORC1), the enzyme responsible for regenerating reduced vitamin K, a cofactor for the gamma-carboxylation of clotting factors.

Frequently asked questions

Should I double the dose if I missed Coumadin? ▾

No. Doubling doses of Coumadin to compensate is not recommended at any 1mg, 2mg, 2.5mg, 3mg, 4mg, 5mg, 6mg, 7.5mg, 10mg strength and increases the risk of side effects without improving efficacy. Take the next scheduled dose normally.

How many missed doses are too many? ▾

Occasional missed doses of Coumadin are usually inconsequential. Repeated missed doses can compromise the therapeutic effect — for chronic conditions like those treated with Cardiovascular Medications, consistent dosing matters. If adherence is hard, discuss reminders, simpler schedules or alternative formulations with the prescriber.

More on Coumadin

The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.