My mum has an irregular heartbeat so is on warfarin(sp?). She has to go to the doctor's or hospital pretty much fortnightly. Just before Christmas the Doctor asked how much she drank. She said 3 or 4 glasses of wine a week - he said "well you don't actually need to give it up but you should do as you won't miss it". Thankfully I never inherited my bloody mindedness from her - if I had she would now be drinking a bottle of Jonny Walker every day just to piss off her GP...