Why stop at grapefruit juice? I've heard citrus juice can have unpredictable effects on any drug. Imagine you have a peanut allergy and have to check the label

Why stop at grapefruit juice? I've heard citrus juice can have unpredictable effects on any drug. Imagine you have a peanut allergy and have to check the labels on everything to see if it contains peanut or processed in a plant with peanuts. Then you walk into the drinks aisle and see grapefruit juice box with a big red banner WARNING THIS PRODUCT CONTAINS GRAPEFRUIT JUICE.