
If have been recently prescribed a type 2 diabetes medicine by your doctor, or if you already get prescription diabetes medicine online from ZOOM Pharmacy or other online pharmacies – you may be wondering about common side effects.
Like all medicines, type 2 diabetes medications can have unwanted side-effects. Some are mild, but some can be serious. The side effects you may experience will depend on the specific medication, or combination of medications, you are taking.
Some side effects might last only a short time until your body gets used to the medication. Some may stop if your dose is lowered. In some cases your doctor may stop the medication and prescribe an alternative.
It is very important to talk to your doctor or pharmacist if you experience any troublesome or painful side effects. And of course, as with all prescription medications, it is vital to take diabetes medicines as directed by your doctor. It is also important to maintain the diet and exercise regime prescribed by your doctor.
Here are some of the common (and very common) side effects of the type 2 diabetes medications most often prescribed in New Zealand.
Please note: this list does not include all side effects of diabetes medications or the different side effects when you take more than one type of diabetes medication.
Some diabetes medicines may cause your blood glucose levels (or blood sugar levels) to drop below a safe level. This is called hypoglycaemia.
Hypoglycaemia can be very common for people taking the following medications
Whilst hypoglycaemia can be mild to moderate, it can also be serious, and even life-threatening, if not treated. So, you and your whānau need to be aware of the symptoms and what to do in case of an episode.
Some symptoms of hypoglycaemia can be feeling shaky, sweaty, dizzy, irritable or confused. You may get a headache or blurred vision. You can read more about other symptoms and treatment of hypoglycaemia at Diabetes NZ and on Health Navigator.
Gastro-intestinal symptoms are common with the following type 2 diabetes drugs:
Metformin: Diarrhoea, nausea, vomiting, and loss of appetite are very common side effects of Metformin, especially at the beginning of treatment. If these symptoms do not go away, or they come back, you should tell your doctor or pharmacist.
Acarbose (Glucobay): Flatulence (wind/gas and bloating) is a very common side effect of Glucobay. Diarrhoea, stomach or gastro pain are common side effects.
Sulphonylurea tablets: Nausea, vomiting, a feeling of fullness or pressure in the stomach area, abdominal pain, loss of appetite, heartburn, constipation, dyspepsia, and diarrhoea are common side effects of patients on sulphonylurea tablets.
Whilst these are common side effects, please remember that not all patients will experience them. Diabetes medication is a vital part of managing your condition. Your doctor has weighed up the benefits you might gain against the risks of side-effects.
Written by Paul Taylor
Paul Taylor is a New Zealand–based healthcare content writer with 5+ years’ experience creating patient friendly articles for online pharmacies and health platforms. He specialises in accessible condition guides, prescription FAQs, OTC advice, and health & wellbeing tips, translating complex medicines or health condition information into clear, actionable content. Paul collaborates with the ZOOM Pharmacy clinical team and bases every article on authoritative sources, peer reviewed journals and national clinical guidelines to ensure evidence based, up to date content. His goal is to help readers feel empowered to make informed decisions about their medicines and wellbeing. This content is general information only and does not replace professional medical advice.