Drug interactions
Bitter melon + Metformin
Severity: Moderate
Bitter melon and Metformin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Bitter melon has glucose-lowering properties in preclinical and limited clinical data. Taken with metformin it may add to the glucose-lowering effect, with a possibility of hypoglycemia, though this is generally mild.
What this interaction means in plain words
Bitter melon and Metformin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive glucose-lowering via insulin-like and insulin-sensitizing constituents of bitter melon.
What to do
Advise patients to report herbal use and monitor blood glucose closely. Adjust the metformin dose if hypoglycemia or low readings occur.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Metformin
Frequently asked questions
Can I take Bitter melon with Metformin?
MediHelp rates the interaction as moderate. Bitter melon and Metformin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Bitter melon has glucose-lowering properties in preclinical and limited clinical data. Taken with metformin it may add to the glucose-lowering effect, with a possibility of hypoglycemia, though this is generally mild.
How serious is the interaction between Bitter melon and Metformin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise patients to report herbal use and monitor blood glucose closely. Adjust the metformin dose if hypoglycemia or low readings occur.
What other medicines interact with Metformin?
MediHelp also lists interactions of Metformin with, for example, Contrast media, Diatrizoate meglumine / diatrizoate, Diatrizoate. The full list is on the Metformin page.
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