Can I take Amitriptyline and Metformin together?
Drug interaction guide
Originally published 12 May 2026
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Taking amitriptyline and metformin together may occasionally affect your blood sugar levels. Some studies suggest amitriptyline might slightly increase blood sugar, while others suggest it could potentially lower it or mask the symptoms of low blood sugar (hypoglycaemia). Additionally, both drugs can sometimes cause side effects like dizziness or an upset stomach, which might be more noticeable when taken together.
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Why this happens
Amitriptyline can affect how your body handles glucose (sugar) and may interfere with the way insulin works. It can also affect the 'warning signs' of low blood sugar, such as a fast heartbeat. There is no major evidence that these drugs change how each other are absorbed or cleared by the liver or kidneys.
What you should do
Back to contentsIt is generally safe to take these together, but you should monitor your blood sugar levels more closely when starting amitriptyline or changing your dose. Be aware of how you feel and report any unusual thirst, frequent urination, or signs of low blood sugar (like sweating or shaking) to your doctor. Ensure you attend your regular diabetes check-ups.
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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.
12 May 2026 | Originally published

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