1. Get the Diabetes Forum App for your phone - available on iOS and Android.
    Dismiss Notice
  2. Guest, we'd love to know what you think about the forum! Take the Diabetes Forum Survey 2022 »
    Dismiss Notice
  3. Diabetes Forum should not be used in an emergency and does not replace your healthcare professional relationship. Posts can be seen by the public.
    Dismiss Notice
Dismiss Notice
Find support, ask questions and share your experiences. Join the community »

Fasting test on Metformin?

Discussion in 'Ask A Question' started by KittyKatty, Sep 18, 2014.

  1. KittyKatty

    KittyKatty Type 2 · Well-Known Member

    Messages:
    79
    Likes Received:
    153
    Trophy Points:
    73
    I'm having my first fasting blood test tomorrow, three months after starting Metformin. But the thing is, isn't it dangerous to fast AND take Metformin? The drug is supposed to lower the blood sugar but if you don't eat, won't it get dangerously low in those 12 hours of no food?
     
  2. jack412

    jack412 Type 2 · Expert

    Messages:
    5,619
    Likes Received:
    6,788
    Trophy Points:
    178
    ask Dr but I think you'll be fine, you can miss the morning one/two, the morning of the test
     
  3. KittyKatty

    KittyKatty Type 2 · Well-Known Member

    Messages:
    79
    Likes Received:
    153
    Trophy Points:
    73
    Miss the food safely or miss the drug?
     
  4. jack412

    jack412 Type 2 · Expert

    Messages:
    5,619
    Likes Received:
    6,788
    Trophy Points:
    178
    if it was me and I wanted to be sure, I would take meds , don't eat after 9pm, don't take morning metformin, get test, have something to eat, take evening med,
    if you want to you can have your morning metformin after your test or miss it completely
    depending what DR says
     
  5. JTL

    JTL Type 2 · Well-Known Member

    Messages:
    4,233
    Likes Received:
    7,878
    Trophy Points:
    178
    Miss the Metformin if you're unsure.
    I'm supposed to take three a day but I decided I wanted to try diet first so ditched two of them almost straight away.
    You'll come to no harm.
    Maybe it would be a good idea to Google Metformin at this stage and see what it is and what it does.
     
  6. JTL

    JTL Type 2 · Well-Known Member

    Messages:
    4,233
    Likes Received:
    7,878
    Trophy Points:
    178
  7. JTL

    JTL Type 2 · Well-Known Member

    Messages:
    4,233
    Likes Received:
    7,878
    Trophy Points:
    178
  8. KittyKatty

    KittyKatty Type 2 · Well-Known Member

    Messages:
    79
    Likes Received:
    153
    Trophy Points:
    73
    Thanks for the replies, people.

    Another thing has occured to me now; perhaps I don't need to fast for the test...
     
  9. jack412

    jack412 Type 2 · Expert

    Messages:
    5,619
    Likes Received:
    6,788
    Trophy Points:
    178
    ring your dr and ask, normally they want a fasting test
     
  10. JTL

    JTL Type 2 · Well-Known Member

    Messages:
    4,233
    Likes Received:
    7,878
    Trophy Points:
    178
    Your doctor should have made that clear.
     
  11. 2131tom

    2131tom Type 2 · Well-Known Member

    Messages:
    279
    Likes Received:
    353
    Trophy Points:
    123
    Jack's right. If they've asked for a fasting test (and they always have with me), then you shouldn't eat anything after 9pm the previous night. You can drink water but nothing else.

    On the Metformin, I've carried on taking it and I've been OK but I suppose missing out the one the evening before and then having one after you've had your test would be OK
     
  12. KittyKatty

    KittyKatty Type 2 · Well-Known Member

    Messages:
    79
    Likes Received:
    153
    Trophy Points:
    73
    My diabetic nurse has a bit of a habit of skimming over the details. I'm sure I must have just assumed it was a fasting test again.
     
  13. KittyKatty

    KittyKatty Type 2 · Well-Known Member

    Messages:
    79
    Likes Received:
    153
    Trophy Points:
    73
    Thanks for that 2131. If it's common practice for 3 or 6 monhtly tests to be done fasting, then I'll assume the same is for me. I've just taken my evening Metformin at 8pm and will have my test around 8am tomorrow morning.

    Cheers for the help, everyone.
     
  14. JTL

    JTL Type 2 · Well-Known Member

    Messages:
    4,233
    Likes Received:
    7,878
    Trophy Points:
    178
    I hate those fasting tests.
    The fact I can't eat means I want to.
    Most nights I don't eat after that time anyway but fasting nights!!!!
    I'd never manage with that Ramadam and similar.
     
  15. JTL

    JTL Type 2 · Well-Known Member

    Messages:
    4,233
    Likes Received:
    7,878
    Trophy Points:
    178
    Come to think of it ... are there any practicing Muslims on here?
    If so how do you manage Ramadam and fasting?
     
  16. Anie

    Anie Type 2 · Well-Known Member

    Messages:
    306
    Likes Received:
    209
    Trophy Points:
    83
    Since I've been on metformin I don't have fasting tests
     
  17. Bluetit1802

    Bluetit1802 Type 2 (in remission!) · Legend

    Messages:
    25,219
    Likes Received:
    30,675
    Trophy Points:
    298
    The only time I have to fast is when they are including a cholesterol test. Otherwise, for HbA1c tests, there is no need to fast. We don't get fasting glucose tests after diagnosis.
     
  18. Kat100

    Kat100 · Guest

    I am on metformin with blood tests every 3 months , and the annual examination and bloods and urIne testing are done fasting ...
    I don't eat For 10 and 12 hours before the test but I do take my medication ....
     
  19. Robbity

    Robbity Type 2 · Expert

    Messages:
    6,312
    Likes Received:
    16,112
    Trophy Points:
    198
    I'm told if it's going to be a fasting test, but I've found in general that if I accidentally do a 12 hour fast my liver kindly takes care of things for me and does a big dump, so my glucose level will actually go up.

    Robbity
     
  20. AlexMBrennan

    AlexMBrennan Type 1 · Well-Known Member

    Messages:
    385
    Likes Received:
    298
    Trophy Points:
    103
    I'm pretty sure that missing one dose of Metformin will have no noticeable impact on your blood glucose.

    I found this which, in particular, states: "
    Metformin. Patients treated with metformin alone may safely fast because the possibility of hypoglycemia is minimal."
     
  • Meet the Community

    Find support, connect with others, ask questions and share your experiences with people with diabetes, their carers and family.

    Did you know: 7 out of 10 people improve their understanding of diabetes within 6 months of being a Diabetes Forum member. Get the Diabetes Forum App and stay connected on iOS and Android

    Grab the app!
  • Tweet with us

  • Like us on Facebook