I've done this and it had very little impact on me. If it were me, I'd just take it again at the normal time tomorrow . But I would also suggest calling your doc and seeing what he thinks.

I would definately make a call to your doctor on this one, or at very least your pharmacist. They may want you to come in for an extra INR just to be sure it isn't too high.

Personally I wouldn't be overly concerned about this, but if it makes you feel better to call the doctor, then do that. I kind of ended up doing a similar type of thing all the time, just in reverse - I'm bad enough at remembering to take a daily pill if I can take it in the morning, but having to take it in the evening meant I was constantly going to bed and forgetting to take my coumadin. What was a huge problem for me was if I just skipped that dose because I had forgotten the night before. My INR stayed a lot more regular when I went ahead and took the dose in the morning if I had forgotten the previous evening (which meant I ended up taking 2 doses roughly at the same time apart as you've just done). Because the warfarin takes so long to actually affect our blood from the time we take it, I never had any problems. I would do the same as rmb said, just consider this your dose for today, then take the next one at the correct time tomorrow.

Thanks you guys! I took your advice and left a message for the nurse to call me back, but I don't feel worried about it anymore...I really appreciate the peace of mind your responses gave me :)

Good! I will go for months and months with no medication errors and then every once in a while, I'll get distracted or something, and take my morning meds at night or my night meds in the morning. And I even have a pill box that's divided by the days, and morning and night. It happens.