Cranberry Juice
You should avoid cranberry juice if you take the anticoagulant warfarin. Like grapefruit, cranberry juice can increase the amount of warfarin circulating in your system and put you at risk for bleeding. People who take other types of anticoagulant medications do not need to restrict their consumption of cranberry juice. But keep in mind any type of fruit juice can raise your blood sugar levels. In general (and especially if you have diabetes along with afib), it’s best to eat whole fruit instead of drinking juice.