Drug interactions
Carbidopa + Trandolapril
Severity: Moderate
Carbidopa and Trandolapril: 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, given with levodopa, increases levodopa availability, which can cause orthostatic hypotension. This can add to the blood pressure lowering of trandolapril.
What this interaction means in plain words
Carbidopa and Trandolapril 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; Trandolapril belongs to Cardiovascular.
Why it happens
Increased central and peripheral dopamine from levodopa causes vasodilation and hypotension, adding to ACE inhibitor effects.
What to do
Monitor blood pressure, including standing pressure, when levodopa/carbidopa is started or adjusted, and reduce the trandolapril dose if symptomatic 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 Trandolapril
- Aliskiren + Trandolapril Contraindicated
- Protein a column + Trandolapril Contraindicated
- Sacubitril / valsartan + Trandolapril Contraindicated
- Sacubitril-valsartan + Trandolapril Contraindicated
- Aldesleukin + Trandolapril Major
- Amifostine + Trandolapril Major
Other interactions of Carbidopa
Frequently asked questions
Can I take Carbidopa with Trandolapril?
MediHelp rates the interaction as moderate. Carbidopa and Trandolapril 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, given with levodopa, increases levodopa availability, which can cause orthostatic hypotension. This can add to the blood pressure lowering of trandolapril.
How serious is the interaction between Carbidopa and Trandolapril?
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 pressure, when levodopa/carbidopa is started or adjusted, and reduce the trandolapril dose if symptomatic hypotension occurs.
What other medicines interact with Trandolapril?
MediHelp also lists interactions of Trandolapril with, for example, Aliskiren, Protein a column, Sacubitril / valsartan. The full list is on the Trandolapril page.
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