Pellicle,
There doesn't seem to be any correlation between body size and warfarin dosage. Both my husband and I are on warfarin, he's 58 years old, 6'4" tall, 265 lbs and takes 22mg of warfarin per week (3 mg x 6, 4 mg x1), he fabricates custom cars and is on his feet all day, up and down on...