A patient of mine returned from dialysis after 11pm. I am to give the evening meds (20:00 meds) at that time. Coumadin is one of them. The lab result did not come in until 11:00 pm. The INR was below therapeutic, therefore I gave the Coumadin without a new order, knowing that the new order would be a higher dose if anything. I felt it was not necessary to call the MD that late at night, that it could wait until the morning. What do you think?