Drug interactions
Metformin-pioglitazone + Trifluoperazine
Severity: Minor
Metformin-pioglitazone and Trifluoperazine: minor 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
Phenothiazine antipsychotics such as trifluoperazine can impair glucose tolerance and may reduce the effectiveness of oral antidiabetic agents. Glycemic control may deteriorate, and hypoglycemia can occur if the phenothiazine is later withdrawn.
What this interaction means in plain words
Metformin-pioglitazone and Trifluoperazine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Phenothiazines may reduce insulin secretion and sensitivity, though the mechanism is not firmly established.
What to do
Check blood glucose when trifluoperazine is started or stopped and adjust antidiabetic doses if needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Metformin-pioglitazone
Frequently asked questions
Can I take Metformin-pioglitazone with Trifluoperazine?
MediHelp rates the interaction as minor. Metformin-pioglitazone and Trifluoperazine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Phenothiazine antipsychotics such as trifluoperazine can impair glucose tolerance and may reduce the effectiveness of oral antidiabetic agents. Glycemic control may deteriorate, and hypoglycemia can occur if the phenothiazine is later withdrawn.
How serious is the interaction between Metformin-pioglitazone and Trifluoperazine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check blood glucose when trifluoperazine is started or stopped and adjust antidiabetic doses if needed.
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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