Depending on the levels of glucose in your blood when you are diagnosed, you may be given the option of reducing your levels through dietary changes and exercise alone.
If your levels are still high after a week or two though, you will be offered metformin tablets. If your fasting blood glucose levels are high and you have particular complications such as macrosomia (where the baby is very large) or hydramnios (excessive amniotic fluid), your team may recommend that you start immediate insulin treatment, with or without metformin (as well as dietary and exercise changes).
"If I’d understood more about it, I’d have stuck with the diet and found ways to lower my blood glucose levels. Having insulin is not just a quick fix so that you can eat what you want." Kiera, mum of one
There are two different types of diabetes medication suitable for women with gestational diabetes: tablets and injection.
Tablets - metformin and glibenclamide
- Metformin reduces the amount of glucose made by the liver and helps your body respond better to the insulin you produce naturally
- Glibenclamide lowers blood glucose by stimulating your pancreas to produce more insulin.
Like all medication, they carry a risk of side effects, so check the patient information leaflet and talk to your doctor about any possible side effects.
Although the patient information leaflet will say that these medications are not to be used during pregnancy, there is strong evidence in the UK for their safety and effectiveness in treating diabetes during pregnancy. Talk to your healthcare team if you have any concerns.
If tablets are not suitable for you, or are unable to control your blood glucose levels sufficiently, you may need to take the hormone insulin, which only works if it is injected. This means you will need to learn to give yourself insulin injections. If this happens, your diabetes team will show you:
- how to inject yourself,
- what times you need to do it,
- how to keep your insulin
- where to put the used needles.
They will also explain the risks of low blood glucose (‘hypoglycaemia’) and what to do about it.
Even if you really don’t like needles, try not to worry too much. Insulin injections are not like injections that you may have had in the past. The needle is so fine it is difficult to feel at all, and it does not need to go in deep because the insulin is injected just underneath the skin rather than into a muscle.
"It’s amazing, the needle itself is tiny – you don’t feel it at all. It was straightforward, though you always have to find somewhere to do it – a loo or something." Katie, mum of two
There are various types of insulin, ranging from quick-acting insulin, which needs to be injected at mealtimes, to long-acting insulin, which is injected at the start or end of the day. Some types are more fast-acting, while others take longer to take effect.
If you are having trouble keeping to the right levels with insulin without severe hypoglycaemia, you should be offered pump therapy. You can read more about this on the Diabetes UK website.
If you are taking medication for gestational diabetes, it will usually be stopped immediately after your baby is born.
Diabetes and driving
If you are taking anything for your diabetes, you need to check the regulations with the DVLA because of the risk of having low blood glucose when driving. In general, if you are treating your diabetes through diet or tablets alone and drive a car or motorcycle, you don’t need to tell the DVLA. If you drive larger vehicles or are treated by insulin, you may need to. Either way, as soon as you are diagnosed make sure you tell your car insurer, or your insurance may be invalid. To find out more about diabetes and driving, read the Diabetes UK factsheet.
Most women are daunted initially by the unfamiliar territory they find themselves in with gestational diabetes. Find some tips here on how to cope mentally.
The emphasis is on trying to keep the birth as normal as possible unless there is a particular reason to do things differently.
Women who are overweight are at higher risk of developing gestational diabetes, although many women who develop it are not overweight at all.
Exercise during pregnancy has a wide range of benefits for you and your baby. If you have gestational diabetes, you have even more reason to exercise: it can help reduce your blood glucose.
If you have gestational diabetes, your diet will become an important part of managing your condition and keeping your pregnancy safe.
Gestational diabetes is treated by making changes to diet and exercise to manage blood sugar levels, and using medication if necessary.
If you have gestational diabetes, measuring your own blood glucose levels will become something you do regularly.
- NICE (2015) Diabetes in pregnancy: management of diabetes and its complications from preconception to the postnatal period, National Institute of Health and Care Excellence https://www.nice.org.uk/guidance/ng3
- 2. NHS Choices [accessed April 2015] Gestational diabetes - treatment http://www.nhs.uk/Conditions/gestational-diabetes/Pages/Treatment.aspx
- 3. Holt RI,Clarke P et al (2008) The effectiveness of glibenclamide in women with gestational diabetes, Diabetes, obesity, metabolism, 2008 Sep;10(10):906-11. Epub 2007 Dec 17.
- 4. Medline Plus [accessed April 2015] Glyburide and Metformin, last revised 09/15/2012www.nlm.nih.gov/medlineplus/druginfo/meds/a699055.html
-  SIGN (2010) Management of diabetes, a clinical guideline, Scottish Intercollegiate Guidelines Network http://www.sign.ac.uk/pdf/sign116.pdf
ℹLast reviewed on March 1st, 2015. Next review date March 1st, 2018.