Can I take Alogliptin and Metformin together?
Drug interaction guide
Originally published 25 Jan 2026
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Taking alogliptin and metformin together is generally safe and very common. However, because both medicines work to lower your blood sugar, there is a slightly higher risk of your blood sugar dropping too low (hypoglycaemia). This is more likely if you are also taking other diabetes medicines like insulin or a sulphonylurea.
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Why this happens
Both drugs work in different ways to lower blood glucose. Alogliptin helps the body release more insulin after eating, while metformin reduces the amount of sugar the liver produces and helps the body use its own insulin better. Together, they have an 'additive' effect, meaning they work as a team to control blood sugar more effectively than either drug alone.
What you should do
Back to contentsYou should continue taking both medicines as prescribed by your doctor. It is important to learn the signs of low blood sugar (such as feeling shaky, sweaty, hungry, or dizzy) and always carry a fast-acting sugar source, like glucose tablets or a sugary drink. If you frequently experience symptoms of low blood sugar, speak to your doctor as they may need to adjust your doses.
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Important precautions
Back to contentsLactic acidosis
Stop taking metformin and seek urgent medical help if you experience severe vomiting, diarrhoea, or dehydration. This medicine can cause a rare but life-threatening build-up of acid in the blood if you become severely unwell or have kidney problems.
Pancreatitis
Stop taking alogliptin and see a doctor immediately if you develop severe and persistent stomach pain, which may reach through to your back. This can be a sign of an inflamed pancreas.
Contrast X-rays/Scans
You must tell your doctor you take metformin if you are having an X-ray or scan involving an injection of 'contrast' dye. You will need to stop taking metformin for 48 hours to prevent sudden kidney damage.
Food and drink warnings
Back to contentsAlcohol
Drinking alcohol while taking metformin can increase the risk of a rare but serious condition called lactic acidosis. It can also cause your blood sugar levels to drop too low (hypoglycaemia). You should avoid excessive alcohol consumption and binge drinking.
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Using other medicines
Back to contentsTaking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published

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