food

When Brian Foster gulped down an eight-ounce glass of cranberry juice one morning, he had no idea what was in store. A few hours later, as he walked down the halls of the University of Ottawa's Faculty of Medicine where he teaches, his blood pressure dropped suddenly and he began to stumble.
The episode soon passed, but Foster realized his "overdose" of cranberry juice had interfered with his medication, metoprolol, a beta-blocker used to treat high blood pressure.