I had my yearly Periodontic cleaning yesterday..I switch between regular cleaning and her every year.(She..being my Periodonist).....6 months in between...I always take the 4 ...500 mg..of Amoxicillin..1 hour before..like everyone should with valve problems... I am blessed that they NEVER ask me about my coumadin...Yes..it did hurt a tad..but NO bleeding..Not even..after I went to look at my Pearlies in Bathroom mirror.after the cleaning..at her office. ..You would think with all that scraping, ect..my gums would have bled..Nope..no sign.. No one should ever be asked to stop taking their coumadin before these cleaning.. If so, time to find yourself another Dentist, Periodonist......Bonnie