Drug interactions
Hydrochlorothiazide + Penicillin g aqueous
Severity: Minor
Hydrochlorothiazide and Penicillin g aqueous: 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 compete with penicillin G for tubular secretion, potentially slightly prolonging penicillin levels. This is rarely clinically significant at usual doses, though high-dose penicillin G also delivers a sodium or potassium load.
What this interaction means in plain words
Hydrochlorothiazide and Penicillin g aqueous 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
Competition for renal tubular organic anion secretion.
What to do
No routine adjustment; monitor renal function and electrolytes with high-dose penicillin G 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 Hydrochlorothiazide
Frequently asked questions
Can I take Hydrochlorothiazide with Penicillin g aqueous?
MediHelp rates the interaction as minor. Hydrochlorothiazide and Penicillin g aqueous 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 compete with penicillin G for tubular secretion, potentially slightly prolonging penicillin levels. This is rarely clinically significant at usual doses, though high-dose penicillin G also delivers a sodium or potassium load.
How serious is the interaction between Hydrochlorothiazide and Penicillin g aqueous?
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 routine adjustment; monitor renal function and electrolytes with high-dose penicillin G therapy.
What other medicines interact with Hydrochlorothiazide?
MediHelp also lists interactions of Hydrochlorothiazide with, for example, Dofetilide, Amifostine, Amiodarone. The full list is on the Hydrochlorothiazide page.
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