Oh my goodness, where do I start? Metformin has no gastric side-effects and there is no evidence for it? I'm afraid I would be looking for another GP if he truly believes that, and if he doesn't believe it then he is not a very good GP because he is not listening to his patients and making things up - the leaflet with the pills explains the side-effects, maybe take it along next time and make him read it in front of you, then get him to explain why you shouldn't have the modified release version
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He also clearly does not understand the benefits of testing for a highly-motivated person such as yourself, and the receptionist should not be conveying this information

The logic of understanding the effect of different food choices on your blood sugar levels so you can tailor your diet to one which is helpful in managing your diabetes is undeniable, you don't need to be Socrates to see that. How else does he suggest you manage your diabetes, guesswork? It really is nonsense and it irritates me more when it appears there is little effort to even understand the process
Could you change GP or even (if necessary) surgery? There's no guarantee, of course, that another would be any better, but this one appears to be a non-starter
Are you using the
SD Codefree Meter which has
test strips at around £8 for 50? It's the cheapest one I am aware of, in terms of ongoing strip costs. You shouldn't have to buy them anyway, the doctor should listen to the patient and not make blanket decisions about the worth of testing. If you are recording your results then you can show him how they are helping you - often when presented with the evidence many will concur and prescribe - it's hard to argue with clear evidence. You should also explain that intensive testing is only necessary whilst you learn about your food tolerances, once you have established the fundamentals you only need to test when trying new things, or for 'confidence' checks that things are staying on track and not changing
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Good luck!
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