Drug interactions
Metformin + Saquinavir
Severity: Moderate
Metformin and Saquinavir: 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
Saquinavir can cause insulin resistance and hyperglycemia, potentially reducing metformin's effect. Diabetes control may worsen during therapy.
What this interaction means in plain words
Metformin and Saquinavir 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
Protease inhibitors reduce peripheral insulin sensitivity and glucose uptake, opposing metformin.
What to do
Monitor glucose and HbA1c after starting saquinavir and adjust metformin or add therapy as required.
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 Metformin with Saquinavir?
MediHelp rates the interaction as moderate. Metformin and Saquinavir 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. Saquinavir can cause insulin resistance and hyperglycemia, potentially reducing metformin's effect. Diabetes control may worsen during therapy.
How serious is the interaction between Metformin and Saquinavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor glucose and HbA1c after starting saquinavir and adjust metformin or add therapy as required.
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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