Drug interactions
Insulin isophane human / insulin regular human + Metformin-pioglitazone
Severity: Moderate
Insulin isophane human / insulin regular human and Metformin-pioglitazone: 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
Premixed human insulin added to metformin and pioglitazone produces additive glucose lowering and a higher risk of hypoglycemia. Pioglitazone with insulin also increases the likelihood of edema and heart failure.
What this interaction means in plain words
Insulin isophane human / insulin regular human and Metformin-pioglitazone 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
Additive glucose-lowering pharmacodynamic effects, with insulin and thiazolidinedione both contributing to fluid retention.
What to do
Monitor glucose closely and lower the insulin dose when hypoglycemia develops or when the other agents are started. Monitor for edema, weight gain and heart failure symptoms.
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-pioglitazone
Frequently asked questions
Can I take Insulin isophane human / insulin regular human with Metformin-pioglitazone?
MediHelp rates the interaction as moderate. Insulin isophane human / insulin regular human and Metformin-pioglitazone 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. Premixed human insulin added to metformin and pioglitazone produces additive glucose lowering and a higher risk of hypoglycemia. Pioglitazone with insulin also increases the likelihood of edema and heart failure.
How serious is the interaction between Insulin isophane human / insulin regular human and Metformin-pioglitazone?
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 closely and lower the insulin dose when hypoglycemia develops or when the other agents are started. Monitor for edema, weight gain and heart failure symptoms.
What other medicines interact with Metformin-pioglitazone?
MediHelp also lists interactions of Metformin-pioglitazone with, for example, Contrast media, Diatrizoate meglumine / diatrizoate, Diatrizoate. The full list is on the Metformin-pioglitazone page.
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