Drug interactions
Carbidopa-entacapone-levodopa + Sapropterin
Severity: Moderate
Carbidopa-entacapone-levodopa and Sapropterin: 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
Sapropterin is a cofactor for tyrosine hydroxylase and nitric oxide synthase, and combined use with levodopa has been associated with reports of convulsions, overstimulation and irritability. Labeling advises caution, though evidence is limited.
What this interaction means in plain words
Carbidopa-entacapone-levodopa and Sapropterin 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-entacapone-levodopa belongs to Central Nervous System; Sapropterin belongs to Miscellaneous.
Why it happens
Not firmly established; possibly enhanced dopaminergic and nitric oxide pathway activity.
What to do
Monitor for agitation, irritability and seizures after starting sapropterin and reduce doses if these occur.
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-entacapone-levodopa
- Carbidopa-entacapone-levodopa + Isocarboxazid Contraindicated
- Carbidopa-entacapone-levodopa + Phenelzine Contraindicated
- Carbidopa-entacapone-levodopa + Selegiline transdermal Contraindicated
- Carbidopa-entacapone-levodopa + Tranylcypromine Contraindicated
- Amisulpride + Carbidopa-entacapone-levodopa Major
- Asenapine transdermal + Carbidopa-entacapone-levodopa Major
Other interactions of Sapropterin
- Avanafil + Sapropterin Moderate
- Carbidopa-levodopa + Sapropterin Moderate
- Levodopa + Sapropterin Moderate
- Methotrexate + Sapropterin Moderate
- Phenobarbitone + Sapropterin Moderate
- Pyrimethamine + Sapropterin Moderate
Frequently asked questions
Can I take Carbidopa-entacapone-levodopa with Sapropterin?
MediHelp rates the interaction as moderate. Carbidopa-entacapone-levodopa and Sapropterin 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. Sapropterin is a cofactor for tyrosine hydroxylase and nitric oxide synthase, and combined use with levodopa has been associated with reports of convulsions, overstimulation and irritability. Labeling advises caution, though evidence is limited.
How serious is the interaction between Carbidopa-entacapone-levodopa and Sapropterin?
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 for agitation, irritability and seizures after starting sapropterin and reduce doses if these occur.
What other medicines interact with Carbidopa-entacapone-levodopa?
MediHelp also lists interactions of Carbidopa-entacapone-levodopa with, for example, Isocarboxazid, Phenelzine, Selegiline transdermal. The full list is on the Carbidopa-entacapone-levodopa page.
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