Coumadin Orders: Two Estimating Methods

Initiation of 5mg Coumadin Therapy

DayINRDose
1-5.0
2-5.0
3< 1.510.0
1.5 to 1.95.0
2.0 to 3.02.5
> 3.00.0
4< 1.510.0
1.5 to 1.97.5
2.0 to 3.05.0
> 3.00.0
5< 2.010.0
2.0 to 3.05.0
> 3.00.0
6< 1.512.5
1.5 to 1.910.0
2.0 to 3.07.5
> 3.00.0
Based on a study with patients also on heparin

Estimating Final Maintenance Dose

After giving 5mg daily Days 1-4
INR on day 5Mg per week
1.071
1.248
1.439
1.633
1.829
2.026
2.223
2.421
2.619
2.817
3.016
3.214
3.413
Based on a study with patients not on heparin
For more info, consult http://www.aafp.org/afp/20050215/poc.html from which these tables are derived.