Drug interactions
Carbidopa + Fosinopril-hydrochlorothiazide
Severity: Moderate
Carbidopa and Fosinopril-hydrochlorothiazide: moderate 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
Carbidopa, usually given with levodopa, can add to the blood pressure-lowering effect of antihypertensives. Orthostatic hypotension may occur, particularly when therapy is started.
What this interaction means in plain words
Carbidopa and Fosinopril-hydrochlorothiazide can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Carbidopa belongs to Central Nervous System; Fosinopril-hydrochlorothiazide belongs to Cardiovascular.
Why it happens
Additive hypotensive effect from levodopa-derived dopamine on top of ACE inhibitor and diuretic actions.
What to do
Monitor blood pressure, including standing readings, when starting or adjusting levodopa/carbidopa, and reduce antihypertensive doses if hypotension occurs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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 Carbidopa
Frequently asked questions
Can I take Carbidopa with Fosinopril-hydrochlorothiazide?
MediHelp rates the interaction as moderate. Carbidopa and Fosinopril-hydrochlorothiazide can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Carbidopa, usually given with levodopa, can add to the blood pressure-lowering effect of antihypertensives. Orthostatic hypotension may occur, particularly when therapy is started.
How serious is the interaction between Carbidopa and Fosinopril-hydrochlorothiazide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, including standing readings, when starting or adjusting levodopa/carbidopa, and reduce antihypertensive doses if hypotension occurs.
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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