Drug interactions
Rifapentine + Saxagliptin-metformin
Severity: Moderate
Rifapentine and Saxagliptin-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
Rifapentine induces CYP3A4 and may reduce saxagliptin and active metabolite levels, potentially weakening glucose control. Rifamycins reduced saxagliptin exposure in studies with rifampin.
What this interaction means in plain words
Rifapentine and Saxagliptin-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.
Rifapentine belongs to Anti Bacterial; Saxagliptin-metformin belongs to Endocrine.
Why it happens
CYP3A4 induction increases saxagliptin metabolism, lowering plasma concentrations.
What to do
Monitor glucose and HbA1c during and after rifapentine therapy. Consider an alternative antidiabetic if control deteriorates.
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 Saxagliptin-metformin
Other interactions of Rifapentine
- Ledipasvir-sofosbuvir + Rifapentine Contraindicated
- Lorlatinib + Rifapentine Contraindicated
- Lurasidone + Rifapentine Contraindicated
- Ranolazine + Rifapentine Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir-voxilaprevir Contraindicated
Frequently asked questions
Can I take Rifapentine with Saxagliptin-metformin?
MediHelp rates the interaction as moderate. Rifapentine and Saxagliptin-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. Rifapentine induces CYP3A4 and may reduce saxagliptin and active metabolite levels, potentially weakening glucose control. Rifamycins reduced saxagliptin exposure in studies with rifampin.
How serious is the interaction between Rifapentine and Saxagliptin-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: Monitor glucose and HbA1c during and after rifapentine therapy. Consider an alternative antidiabetic if control deteriorates.
What other medicines interact with Saxagliptin-metformin?
MediHelp also lists interactions of Saxagliptin-metformin with, for example, Atazanavir, Clozapine, Contrast media. The full list is on the Saxagliptin-metformin page.
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