Drug interactions
Levodopa + Tiotropium
Severity: Minor
Levodopa and Tiotropium: 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
Antimuscarinics can complement levodopa in parkinsonism but may worsen dyskinesia, and systemic anticholinergic effects such as confusion and constipation can add up. Slowed gastric emptying can delay levodopa absorption. With inhaled tiotropium, systemic exposure is low so the effect is usually small.
What this interaction means in plain words
Levodopa and Tiotropium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Levodopa belongs to Central Nervous System; Tiotropium belongs to Respiratory.
Why it happens
Pharmacodynamic anticholinergic effects and possible delayed gastric emptying reducing levodopa absorption.
What to do
Monitor motor control, dyskinesia and cognition in Parkinson's patients starting tiotropium. Adjust levodopa only if symptoms change.
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?
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Other interactions of Tiotropium
Other interactions of Levodopa
- Isocarboxazid + Levodopa Contraindicated
- Levodopa + Phenelzine Contraindicated
- Levodopa + Phenelzine (nonselective MAOI) Contraindicated
- Levodopa + Procarbazine Contraindicated
- Levodopa + Tranylcypromine Contraindicated
- Amisulpride + Levodopa Major
Frequently asked questions
Can I take Levodopa with Tiotropium?
MediHelp rates the interaction as minor. Levodopa and Tiotropium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Antimuscarinics can complement levodopa in parkinsonism but may worsen dyskinesia, and systemic anticholinergic effects such as confusion and constipation can add up. Slowed gastric emptying can delay levodopa absorption. With inhaled tiotropium, systemic exposure is low so the effect is usually small.
How serious is the interaction between Levodopa and Tiotropium?
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 motor control, dyskinesia and cognition in Parkinson's patients starting tiotropium. Adjust levodopa only if symptoms change.
What other medicines interact with Tiotropium?
MediHelp also lists interactions of Tiotropium with, for example, Glycopyrrolate inhaled, Indacaterol-glycopyrronium, Revefenacin. The full list is on the Tiotropium page.
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