Drug interactions
Metformin-pioglitazone + Phentermine
Severity: Minor
Metformin-pioglitazone and Phentermine: 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
Phentermine promotes weight loss and may alter insulin requirements, while its sympathomimetic action may modestly affect glucose. Glycemic control may change in either direction when it is started or stopped.
What this interaction means in plain words
Metformin-pioglitazone and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Metformin-pioglitazone belongs to Endocrine; Phentermine belongs to Central Nervous System.
Why it happens
Sympathomimetic effects with weight loss and reduced food intake give variable pharmacodynamic effects on glucose.
What to do
Monitor blood glucose and adjust antidiabetic doses as weight changes. Watch for hypoglycemia if phentermine is stopped.
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
Other interactions of Phentermine
- Isocarboxazid + Phentermine Contraindicated
- Linezolid + Phentermine Contraindicated
- Phenelzine + Phentermine Contraindicated
- Phentermine + Procarbazine Contraindicated
- Phentermine + Rasagiline Contraindicated
- Phentermine + Selegiline Contraindicated
Frequently asked questions
Can I take Metformin-pioglitazone with Phentermine?
MediHelp rates the interaction as minor. Metformin-pioglitazone and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Phentermine promotes weight loss and may alter insulin requirements, while its sympathomimetic action may modestly affect glucose. Glycemic control may change in either direction when it is started or stopped.
How serious is the interaction between Metformin-pioglitazone and Phentermine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose and adjust antidiabetic doses as weight changes. Watch for hypoglycemia if phentermine is stopped.
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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