Drug interactions
Etonogestrel + Metformin
Severity: Minor
Etonogestrel and Metformin: minor 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
Etonogestrel, a progestin used in implants and vaginal rings, may slightly impair glucose tolerance. This could modestly reduce the glucose-lowering effect of metformin, though clinical significance is usually small.
What this interaction means in plain words
Etonogestrel and Metformin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Etonogestrel belongs to Endocrine; Metformin belongs to Endocrine.
Why it happens
Pharmacodynamic antagonism through mild progestin effects on insulin sensitivity.
What to do
No routine change is required. Monitor glycemic control after starting etonogestrel and adjust therapy if needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Metformin
Other interactions of Etonogestrel
Frequently asked questions
Can I take Etonogestrel with Metformin?
MediHelp rates the interaction as minor. Etonogestrel and Metformin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Etonogestrel, a progestin used in implants and vaginal rings, may slightly impair glucose tolerance. This could modestly reduce the glucose-lowering effect of metformin, though clinical significance is usually small.
How serious is the interaction between Etonogestrel and Metformin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is required. Monitor glycemic control after starting etonogestrel and adjust therapy if needed.
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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