At a monthly cost of approximately $255 for a 20-mg daily dosage , rivaroxaban is significantly more expensive than warfarin ( approximately $6 for a 30-day supply of 1 - , 2 - , 2.5 - , or 5-mg tablets ; and between $6 and $7 for a 30-day supply of 7.5 - or 10-mg tablets ) , and roughly the same price as dabigatran ( approximately $255 for a ...