The short answer
Extra sedation from German chamomile flower extract with ropinirole is theoretical, not demonstrated. Ropinirole itself can cause sudden sleep episodes, so review a chamomile sleep product with your pharmacist if you are already drowsy or take other sedating medicines.
What this answer covers
German chamomile flowering-top extract, with Matricaria recutita and Matricaria chamomilla identity supported by NCCIH; not Roman chamomile or an assumed tea-equivalent dose.
- Supplement or preparation
- Matricaria chamomilla (German chamomile) flower extract
- Medication ingredient
- ropinirole
What the safety guidance says
NCCIH describes a possible interaction with sedatives as theoretical. This is a reason to check the combination, but it is not evidence that German chamomile has been shown to increase ropinirole-related sedation.
What the extract trial found
A small four-week trial of standardized German chamomile flowering-top extract did not find a significant improvement in its primary sleep outcomes or a significant difference in adverse events versus placebo. It did not test the combination with ropinirole.
Match the plant and preparation
The study used a specific German chamomile extract. Roman chamomile is a different plant, and tea or a mixed sleep product cannot be assumed to give the same exposure. Bring the full ingredient list to your pharmacist.
If sleepiness develops
Contact your prescriber promptly for new marked daytime sleepiness or falling asleep during ordinary activities. Do not drive or use machinery if this occurs. Ropinirole can cause sleep episodes even without a warning feeling of drowsiness; the treating team should decide how to change treatment.
Evidence and practical considerations
Side effects & toxicity
A theoretical sedation precaution is reasonable, while the small extract trial did not establish significant primary sleep benefit or increased adverse events.
- Exact scope
- German chamomile flowering-top extract, with Matricaria recutita and Matricaria chamomilla identity supported by NCCIH; not Roman chamomile or an assumed tea-equivalent dose. with Oral immediate-release ropinirole; hydrochloride salt expressed as equivalent free base in the inspected label.
- Medication form and route
- oral ropinirole; supplement preparation and route described in scope
- Timing or duration
- No exact-pair safe duration or protective spacing interval established.
What remains uncertain
- No ropinirole trial; one standardized extract and small insomnia sample cannot establish pair safety or additive CNS depression.
Factors that may matter: existing sleepiness; other sedating medicines; exact flowering-top extract.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: People prescribed oral immediate-release ropinirole tablets for Parkinson disease or primary restless legs syndrome.
Ropinirole can cause somnolence, sudden sleep episodes and orthostatic hypotension. Concomitant sedating medicines or alcohol can increase sleepiness risk. CYP1A2 is its major metabolic enzyme; inhibitors and inducers may alter clearance. Ciprofloxacin increased exposure, whereas theophylline did not. Cigarette smokers had lower dose-normalized exposure than nonsmokers in a small RLS comparison.
How this applies: Exact oral ropinirole risk and metabolic context; section 11 justifies hydrochloride-to-free-base active-moiety identity only.
None of these ten supplement pairs is directly tested in this label. Cigarette smoking is not interchangeable with oral cannabis or isolated CBD; ciprofloxacin results are not caffeine results. No extended-release kinetic equivalence assumed.
Source 2: randomized placebo-controlled pilot study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: 34 adults with primary insomnia; current hypnotic treatment excluded.
No significant primary sleep benefit or adverse-event difference; reported adverse events were mild and transient.
How this applies: Exact German chamomile identity bridge supplied by NCCIH; flowering-top extract evidence, not Roman chamomile or a tea equivalent.
No ropinirole co-use; small study and one ethanol/water extract cannot establish all products safe or prove additive sedation.
Source 3: official product information or herbal guidance
nccih.nih.gov · Source check Sep 10, 2026
Population: People using German chamomile preparations.
Interactions with sedatives are described as theoretical. German and Roman chamomile are distinguished.
How this applies: Supports a theoretical sedation precaution and the exact German chamomile name bridge.
No ropinirole trial or effect-size estimate. Teas, extracts and skin products have different exposures.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Sources inspected and exact current claim adjudicated; no clinical review asserted. | |
| Research summary published |
Article revision: f388a6dc287a08c9
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.