While it would be absurd to suggest that family doctors should be aware of the more obscure side effects of all the drugs they prescribe, this situation is rather different. Bendroflumethiazide is one of the commoner drugs prescribed for raised blood pressure and it is well known to cause diabetes in almost 10 per cent of those taking it. So for her family doctor to fail to make the connection is definitely a bit odd. She did the sensible thing and binned her pills. Gratifyingly, her “diabetes” has since cured itself, and for good measure, her blood pressure has also remained satisfactory.