The warfarin dosages suggested by my MD are daily alternating - full tablet, half tablet, full tablet, half tablet, etc. My INR rises and falls like a sine wave in relation to my dosage schedule. On average I take .75 of a tablet per day. Assuming I can do an accurate break at 3/4 tablet, wouldn't it make more sense for me to take .75 of a tablet daily? And obviously if a tablet is available at 75% of my present tablet I'd seek to switch to it.