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Drug interactions

Carbidopa + Lisinopril

Severity: Minor

Carbidopa and Lisinopril: 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

Carbidopa is used with levodopa, and this combination can cause orthostatic hypotension. Carbidopa alone has little hypotensive effect, so any interaction with lisinopril arises mainly when levodopa is also present.

What this interaction means in plain words

Carbidopa and Lisinopril have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.

Carbidopa belongs to Central Nervous System; Lisinopril belongs to Cardiovascular.

Evidence level: Low

Why it happens

Additive hypotension, mainly via levodopa when co-administered; carbidopa alone has minimal effect.

What to do

Monitor blood pressure and orthostatic symptoms when levodopa/carbidopa is started, and reduce the antihypertensive dose if needed.

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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Carbidopa with Lisinopril?

MediHelp rates the interaction as minor. Carbidopa and Lisinopril have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Carbidopa is used with levodopa, and this combination can cause orthostatic hypotension. Carbidopa alone has little hypotensive effect, so any interaction with lisinopril arises mainly when levodopa is also present.

How serious is the interaction between Carbidopa and Lisinopril?

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 orthostatic symptoms when levodopa/carbidopa is started, and reduce the antihypertensive dose if needed.

What other medicines interact with Lisinopril?

MediHelp also lists interactions of Lisinopril with, for example, Aliskiren, Protein a column, Sacubitril / valsartan. The full list is on the Lisinopril page.

Full monographs, dosing and an interaction checker in the MediHelp app

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