Why Grapefruit and Your Meds Don't Mix

While reading your prescription label, you see typical warnings: "may cause drowsiness, nausea and headaches," "do not take while operating heavy machinery," and the seemingly random "do not eat grapefruit while taking this medicine."

It's a disappointment to those who enjoy a glass of grapefruit juice when washing down their pills, but doctors have known for almost 15 years that this fruit can cause serious interactions with some medications. However, only now can they completely explain why grapefruit may be a pill taker's enemy.