Drug interactions
Metformin + Norethindrone
Severity: Minor
Metformin and Norethindrone: 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
Norethindrone, particularly in combined contraceptives, can slightly impair glucose tolerance and may weaken glycemic control in patients taking metformin. The clinical effect is generally small.
What this interaction means in plain words
Metformin and Norethindrone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Progestogen activity can reduce insulin sensitivity, producing mild pharmacodynamic antagonism of metformin.
What to do
Monitor glucose when starting or stopping norethindrone and adjust metformin if control changes.
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
Frequently asked questions
Can I take Metformin with Norethindrone?
MediHelp rates the interaction as minor. Metformin and Norethindrone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Norethindrone, particularly in combined contraceptives, can slightly impair glucose tolerance and may weaken glycemic control in patients taking metformin. The clinical effect is generally small.
How serious is the interaction between Metformin and Norethindrone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor glucose when starting or stopping norethindrone and adjust metformin if control changes.
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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