Life can be onerous enough for those taking blood-thinning drugs such as warfarin, without the further admonition that they be “careful” about how much they drink and the foods they consume, lest they cause some bleeding complication. It is thus reassuring to learn from Dr Ivan Stockley, author of Stockley’s Drug Interactions, the standard textbook on the subject, that these supposed hazards are for the most part “time-worn medical myths”.