I have recently spent 3 months in the Caribbean and suffered from two UTI whilst there. There was blood in my pee even after long periods on an antibiotics. I have had bladder cancer in the past, but have just had it checked out and the bladder is fine. I take Warfarin daily as i have an artificial mitral valve and now the urologist is telling me that my long stay in the Caribbean could have affected my INR. I do have monthly checks of my INR and it remained steady. Has anyone else encountered this problem? It is worrying as I will be returning to the Caribbean for the winter and I need to cure or manage this worry before I leave
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