Drug interactions
Chlorothiazide + Piperacillin
Severity: Minor
Chlorothiazide and Piperacillin: 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
Thiazides may slightly reduce renal clearance of penicillins. Also, piperacillin and thiazides can both lower potassium. The pharmacokinetic effect is small.
What this interaction means in plain words
Chlorothiazide and Piperacillin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Chlorothiazide belongs to Cardiovascular; Piperacillin belongs to Anti Bacterial.
Why it happens
Competition for renal tubular organic anion secretion; additive potassium loss is a separate pharmacodynamic effect.
What to do
No dose change is generally needed. Monitor serum potassium during prolonged combined therapy.
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 Piperacillin
- Piperacillin + Vancomycin Major
- Acetylsalicylic acid + Piperacillin Moderate
- Amikacin + Piperacillin Moderate
- Antithrombin alfa + Piperacillin Moderate
- Antithrombin iii + Piperacillin Moderate
- Argatroban + Piperacillin Moderate
Other interactions of Chlorothiazide
Frequently asked questions
Can I take Chlorothiazide with Piperacillin?
MediHelp rates the interaction as minor. Chlorothiazide and Piperacillin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Thiazides may slightly reduce renal clearance of penicillins. Also, piperacillin and thiazides can both lower potassium. The pharmacokinetic effect is small.
How serious is the interaction between Chlorothiazide and Piperacillin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose change is generally needed. Monitor serum potassium during prolonged combined therapy.
What other medicines interact with Piperacillin?
MediHelp also lists interactions of Piperacillin with, for example, Vancomycin, Acetylsalicylic acid, Amikacin. The full list is on the Piperacillin page.
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