The short answer
Guarana may add unwanted stimulation while you use levalbuterol. Review the actual product and amount; a specific combination risk has not been measured.
What this answer covers
Paullinia cupana; oral seed powder or extract, distinct from multi-ingredient energy blends.
- Supplement or preparation
- Paullinia cupana
- Medication ingredient
- levalbuterol
Why the combination deserves review
Levalbuterol can cause tremor and cardiovascular effects. Caffeine can also cause palpitations, anxiety and sleep problems. Overlapping effects justify reviewing use, but do not establish that the combination always causes harm.
Check the preparation
Guarana can contribute caffeine; seed or extract weight does not provide a reliable caffeine total. EMA precautions for specified guarana seed medicines include hypertension and arrhythmias.
Keep the inhaled medicine plan
These findings apply to levalbuterol inhalation products. The nebulizer solution and HFA inhaler have their own instructions. Levalbuterol is the R-enantiomer of albuterol; studies of racemic albuterol cannot automatically supply a dose or risk estimate for this product.
Watch symptoms and asthma control
Report new troublesome tremor, racing heartbeat or dizziness after a supplement change. Fainting, chest pain or severe breathing difficulty needs urgent care. Needing levalbuterol more often than usual is a reason to contact the asthma clinician, not to add more stimulants.
Evidence and practical considerations
Side effects & toxicity
The exact levalbuterol label supports cardiovascular and CNS effects, while caffeine or the specified botanical supplies independent stimulant context. Increased exact-pair toxicity remains an inference rather than a measured clinical outcome.
- Exact scope
- Paullinia cupana; oral seed powder or extract, distinct from multi-ingredient energy blends. with Exact levalbuterol hydrochloride nebulized inhalation solution and tartrate HFA inhalation aerosol. Exact RxNorm IN237159, R-enantiomer of albuterol. Hydrochloride nebulizer and tartrate HFA labels are distinct; racemic albuterol is a comparator, not an interchangeable exact drug.
- Medication form and route
- inhalation
- Timing or duration
- Source-specific single-dose, repeated-dose and observational exposures distinguished.
What remains uncertain
- No direct exact-pair human study identified; no automatic extrapolation from racemic albuterol, no validated safe caffeine dose or spacing rule.
Factors that may matter: preparation and plant part; clinical indication; dose; other medicines; baseline alertness.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: People prescribed levalbuterol.
Exact product cardiovascular effects, possible ECG changes, tremor, transient hypokalemia and cautions with additional adrenergic drugs.
How this applies: Exact RxNorm IN237159, R-enantiomer of albuterol. Hydrochloride nebulizer and tartrate HFA labels are distinct; racemic albuterol is a comparator, not an interchangeable exact drug.
No universal supplement dose, interval, event rate or untested formulation equivalence.
Source 2: current product label
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: People prescribed levalbuterol.
Exact product cardiovascular effects, possible ECG changes, tremor, transient hypokalemia and cautions with additional adrenergic drugs.
How this applies: Exact RxNorm IN237159, R-enantiomer of albuterol. Hydrochloride nebulizer and tartrate HFA labels are distinct; racemic albuterol is a comparator, not an interchangeable exact drug.
No universal supplement dose, interval, event rate or untested formulation equivalence.
Source 3: official supplement guidance
ema.europa.eu · Source check Sep 10, 2026
Population: People considering the specified supplement.
HMPC assesses oral dried powdered guarana seeds for traditional fatigue use; cardiovascular contraindications apply to specified seed medicines.
How this applies: Supplement-only context; explicit medication and preparation bridge required.
Not proof of exact-drug combination risk or equivalence to caffeine capsules or multi-ingredient energy products.
Source 4: official supplement guidance
fda.gov · Source check Sep 10, 2026
Population: People considering the specified supplement.
Caffeine can cause palpitations, anxiety, sleep problems and other effects; sensitivity depends partly on medicines and individual factors.
How this applies: Supplement-only context; explicit medication and preparation bridge required.
General adult intake advice does not establish a safe caffeine limit with this medicine.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Research summary published | |
| Article prepared | |
| Current exact available claims adjudicated using original captures and explicit identity and comparator limits. |
Article revision: 4c1d5daf53fbc0cb
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.