Matcha tea with warfarin okay to take?

Depends on amount.: See this discussion about green tea and Warfarin. It's usually OK, depending on amount, and how it is prepared. There is a lot more info on this site for people on warfarin. Hope it is useful to you! http://www.ptinr.com/en/home/warfarin-you/dietary-food-beverage/beverage-interactions/green-tea-and-warfarin.html

Generally OK but:: See Dr. Rhoads' fine answer. This should be fine but it would be ideal to consume the same amount every day. The article she cites states "onsuming a consistent amount of vitamin K per day will help your INR to remain in range." Research shows that people on warfarin taking 150 mcg/day of K results in improved and more stable anticoagulation- see https://tinyurl.com/y7lvmrsv Discuss with your Dr.