Can You Take Metformin with Aspirin?
Last reviewed: · Source: US FDA drug label database
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Metformin and aspirin (including low-dose 75mg) are safe to take together — there is no significant interaction between them.
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Is it safe to take Metformin with Aspirin?
Metformin and aspirin — including low-dose aspirin (75mg) for cardiovascular protection — can safely be taken together. Many patients with type 2 diabetes also take low-dose aspirin for cardiovascular risk reduction, and this is a standard, widely used combination. At analgesic doses of aspirin (300-600mg), the same general NSAID cautions apply as with other NSAIDs in diabetics (blood glucose effects), but there is no dangerous drug interaction with metformin itself.
How do Metformin and Aspirin interact?
Metformin's organic cation transporter (OCT) renal clearance is not meaningfully affected by aspirin. Some studies have investigated whether high-dose salicylates affect insulin sensitivity (possible mild benefit), but at anti-platelet doses (75mg) no clinical interaction with metformin has been established.
Data sourced from the US Food and Drug Administration (FDA) drug label database: OpenFDA metformin and aspirin labels — no interaction listed.
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Standard precautions for each: metformin requires adequate kidney function; high-dose aspirin should be used cautiously in peptic ulcer disease and with other anticoagulants.
For weight-based or dosage calculations, our dosage calculators can help. If you're tracking what you eat alongside your medication, 247CalorieCheck's food and nutrition checker is worth a look too.
What if I've already taken Metformin and Aspirin?
No action needed — a safe combination.
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Not sure if this combination is safe for your specific situation?
HealthLabs.com lets you check liver enzyme or kidney function levels before combining medications long-term — no GP referral needed.
Check your levels at HealthLabs →Always speak to your pharmacist or GP for personalised medical advice. Affiliate link — we may earn a commission.
Frequently Asked Questions
Can I take aspirin with metformin?
Yes — both low-dose (75mg) and occasional standard-dose aspirin are safe with metformin. No significant interaction.
Can diabetics take aspirin?
Yes — low-dose aspirin (75mg) is often recommended for cardiovascular protection in type 2 diabetes. Discuss with your GP whether it's appropriate for you.
Does aspirin affect blood sugar with metformin?
High-dose aspirin can modestly affect glucose metabolism, but at low (75mg) anti-platelet doses, no clinically meaningful effect on blood glucose control has been established.
What painkillers are safe with metformin?
Paracetamol is the safest routine painkiller. Low-dose aspirin and occasional ibuprofen are generally fine, though regular NSAID use should be avoided in diabetic kidney disease.