... 2.5 inr on 2-4 mg until June 1. Since then they have been giving him 8-12 mg/day and his INR spiked to 5.2 They took him off for a day and it went to 3.6. Now they want him back on 8-10 mg/day. He's weaker and colder. What is the harm in bringing him down to 4-5 mg for a week and just see? I feel like they are just hammering him with it