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Usuallly it's a good 8 to 12 hours. With nothing to eat or drink for that time. If you take medications daily for health reasons, you may check with your doctor to see which are okay to take with a sip of water the day of the test.

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Wiki User

11y ago
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Wiki User

9y ago

Most times you need to fast for 12 hours. It will depend upon the exact things your doctor is testing for.

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Wiki User

10y ago

Fasting blood sugar is normally checked between 4 and 8 hours after the last meal. This gives the body enough time to process food and restore blood sugar levels to normal.

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14y ago

You don't need to.

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12y ago

Normally it is 8-12 hours.

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Wiki User

13y ago

after 6pm the day before

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Wiki User

12y ago

12 hours or more

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Wiki User

11y ago

normally 12 hrs.

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Anonymous

Lvl 1
3y ago

My fasting sugar level is 150 to 180 for last 2 months due to Covid situation proper test and consultancy not feasible. Taking regular medicines Janumet 50x500BD and Domi..once before breakfast any suggestions. Diet under control minimum 3 km walking daily.

Advise please

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Q: How many hours should you fast before a diabetes test?
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