Drug interactions
Fosinopril-hydrochlorothiazide + Sodium bicarbonate
Severity: Minor
Fosinopril-hydrochlorothiazide and Sodium bicarbonate: 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
Sodium bicarbonate provides a sodium load that may cause fluid retention and raise blood pressure, which can reduce the antihypertensive effect of fosinopril and the thiazide. Antacid use may also modestly reduce ACE inhibitor absorption. Thiazides combined with bicarbonate can also worsen metabolic alkalosis and hypokalemia.
What this interaction means in plain words
Fosinopril-hydrochlorothiazide and Sodium bicarbonate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Fosinopril-hydrochlorothiazide belongs to Cardiovascular; Sodium bicarbonate belongs to Gastrointestinal Tract.
Why it happens
Sodium load causing fluid retention, and possible reduced ACE inhibitor absorption with antacids.
What to do
Monitor blood pressure and electrolytes with regular bicarbonate use, and separate fosinopril from antacid doses by about two hours.
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 Fosinopril-hydrochlorothiazide
- Aliskiren + Fosinopril-hydrochlorothiazide Contraindicated
- Dofetilide + Fosinopril-hydrochlorothiazide Contraindicated
- Fosinopril-hydrochlorothiazide + Protein a column Contraindicated
- Fosinopril-hydrochlorothiazide + Sacubitril / valsartan Contraindicated
- Aldesleukin + Fosinopril-hydrochlorothiazide Major
- Amifostine + Fosinopril-hydrochlorothiazide Major
Other interactions of Sodium bicarbonate
- Acetylsalicylic acid + Sodium bicarbonate Moderate
- Alendronate + Sodium bicarbonate Moderate
- Amantadine + Sodium bicarbonate Moderate
- Carbonyl iron + Sodium bicarbonate Moderate
- Cefditoren + Sodium bicarbonate Moderate
- Cefpodoxime + Sodium bicarbonate Moderate
Frequently asked questions
Can I take Fosinopril-hydrochlorothiazide with Sodium bicarbonate?
MediHelp rates the interaction as minor. Fosinopril-hydrochlorothiazide and Sodium bicarbonate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Sodium bicarbonate provides a sodium load that may cause fluid retention and raise blood pressure, which can reduce the antihypertensive effect of fosinopril and the thiazide. Antacid use may also modestly reduce ACE inhibitor absorption. Thiazides combined with bicarbonate can also worsen metabolic alkalosis and hypokalemia.
How serious is the interaction between Fosinopril-hydrochlorothiazide and Sodium bicarbonate?
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 pressure and electrolytes with regular bicarbonate use, and separate fosinopril from antacid doses by about two hours.
What other medicines interact with Fosinopril-hydrochlorothiazide?
MediHelp also lists interactions of Fosinopril-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Protein a column. The full list is on the Fosinopril-hydrochlorothiazide page.
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