Is allegra a blood thinner? Will it affect tan INR?

Should a person on blood thinners take Allegra for allergies

The majority of sites state no interaction between Allegra and Warfarin - EHealth did have a study over 10 years of about 1400 people and there was some "increase" in INR with these medications.
I always figure - ASK your doctor or coumadin clinic before adding any new medication - then maybe get your INR chaecked sooner than normally would. I do home checking on a weekly basis so it is easier if the doctor okays a new medicine for me to see the effect on my INR

No its not an anticoagulant.