Drug interactions
Metformin-sitagliptin + Risperidone
Severity: Moderate
Metformin-sitagliptin and Risperidone: 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
Risperidone can cause weight gain and hyperglycemia, potentially worsening diabetes control in patients on metformin-sitagliptin. The effect is usually gradual and variable.
What this interaction means in plain words
Metformin-sitagliptin and Risperidone 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.
Metformin-sitagliptin belongs to Endocrine; Risperidone belongs to Central Nervous System.
Why it happens
Atypical antipsychotic-induced insulin resistance and weight gain oppose the glucose-lowering action of antidiabetic drugs.
What to do
Monitor blood glucose and HbA1c at baseline and regularly during risperidone therapy, adjusting antidiabetic treatment 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-sitagliptin
Other interactions of Risperidone
- Ibutilide + Risperidone Contraindicated
- Risperidone + Vandetanib Contraindicated
- Adagrasib + Risperidone Major
- Amiodarone + Risperidone Major
- Amisulpride + Risperidone Major
- Amoxapine + Risperidone Major
Frequently asked questions
Can I take Metformin-sitagliptin with Risperidone?
MediHelp rates the interaction as moderate. Metformin-sitagliptin and Risperidone 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. Risperidone can cause weight gain and hyperglycemia, potentially worsening diabetes control in patients on metformin-sitagliptin. The effect is usually gradual and variable.
How serious is the interaction between Metformin-sitagliptin and Risperidone?
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 at baseline and regularly during risperidone therapy, adjusting antidiabetic treatment as required.
What other medicines interact with Metformin-sitagliptin?
MediHelp also lists interactions of Metformin-sitagliptin with, for example, Clozapine, Contrast media, Diatrizoate meglumine / diatrizoate. The full list is on the Metformin-sitagliptin page.
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