Drug interactions
Carbidopa-levodopa + Spironolactone
Severity: Moderate
Carbidopa-levodopa and Spironolactone: 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
Levodopa can cause orthostatic hypotension, and spironolactone has diuretic and blood pressure lowering effects. Together they may cause additive hypotension, especially with volume depletion.
What this interaction means in plain words
Carbidopa-levodopa and Spironolactone 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-levodopa belongs to Central Nervous System; Spironolactone belongs to Cardiovascular.
Why it happens
Additive pharmacodynamic hypotensive effects of levodopa and diuretic-induced volume reduction and aldosterone antagonism.
What to do
Monitor blood pressure and orthostatic symptoms during initiation or dose changes. Lower the spironolactone dose if hypotension develops.
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 Carbidopa-levodopa
- Carbidopa-levodopa + Isocarboxazid Contraindicated
- Carbidopa-levodopa + Phenelzine Contraindicated
- Carbidopa-levodopa + Selegiline transdermal Contraindicated
- Carbidopa-levodopa + Tranylcypromine Contraindicated
- Amisulpride + Carbidopa-levodopa Major
- Asenapine + Carbidopa-levodopa Major
Other interactions of Spironolactone
- Amiloride + Spironolactone Contraindicated
- Eplerenone + Spironolactone Contraindicated
- Spironolactone + Triamterene Contraindicated
- Abiraterone + Spironolactone Major
- Aceclofenac + Spironolactone Major
- Acemetacin + Spironolactone Major
Frequently asked questions
Can I take Carbidopa-levodopa with Spironolactone?
MediHelp rates the interaction as moderate. Carbidopa-levodopa and Spironolactone 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. Levodopa can cause orthostatic hypotension, and spironolactone has diuretic and blood pressure lowering effects. Together they may cause additive hypotension, especially with volume depletion.
How serious is the interaction between Carbidopa-levodopa and Spironolactone?
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 and orthostatic symptoms during initiation or dose changes. Lower the spironolactone dose if hypotension develops.
What other medicines interact with Carbidopa-levodopa?
MediHelp also lists interactions of Carbidopa-levodopa with, for example, Isocarboxazid, Phenelzine, Selegiline transdermal. The full list is on the Carbidopa-levodopa page.
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