Drug interactions
Glipizide-metformin + Saquinavir
Severity: Moderate
Glipizide-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
Protease inhibitors such as saquinavir can cause insulin resistance and hyperglycemia, which may reduce the glucose-lowering effect of glipizide-metformin. Glycemic control may deteriorate, particularly after starting or changing antiretroviral therapy.
What this interaction means in plain words
Glipizide-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 induce insulin resistance and impair glucose metabolism, opposing the effect of antidiabetic drugs (pharmacodynamic antagonism).
What to do
Monitor blood glucose and HbA1c after starting or stopping saquinavir and increase the antidiabetic dose as needed.
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 Glipizide-metformin
Frequently asked questions
Can I take Glipizide-metformin with Saquinavir?
MediHelp rates the interaction as moderate. Glipizide-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. Protease inhibitors such as saquinavir can cause insulin resistance and hyperglycemia, which may reduce the glucose-lowering effect of glipizide-metformin. Glycemic control may deteriorate, particularly after starting or changing antiretroviral therapy.
How serious is the interaction between Glipizide-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 blood glucose and HbA1c after starting or stopping saquinavir and increase the antidiabetic dose as needed.
What other medicines interact with Glipizide-metformin?
MediHelp also lists interactions of Glipizide-metformin with, for example, Contrast media, Diatrizoate meglumine / diatrizoate, Diatrizoate. The full list is on the Glipizide-metformin page.
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