The short answer
No study links green tea extract with linezolid, and the linezolid label's blood pressure warning is about ephedrine-type stimulants, not caffeine. Green tea extract contains caffeine and has been reported to raise blood pressure as a side effect, while randomised trials found catechin-rich products slightly lower blood pressure. Treat this as ordinary stimulant caution during a short course, not a demonstrated interaction.
What this answer covers
Green tea (Camellia sinensis) leaf extract supplements in tablets, capsules or powders; brewed tea and decaffeinated extracts differ in caffeine.
- Supplement or preparation
- green tea extract
- Medication ingredient
- linezolid
What the label covers
Linezolid is a reversible MAO inhibitor whose label warns of enhanced blood pressure responses to sympathomimetic agents such as pseudoephedrine and requires blood pressure monitoring in uncontrolled hypertension. Caffeine and tea products are not mentioned.
Evidence on green tea extract alone points both ways
Federal consumer guidance lists increased blood pressure among side effects of green tea extract supplements, which contain caffeine. A meta-analysis of 13 randomised trials found green tea, especially as extract, lowered systolic pressure by about 2 mmHg. Neither source involved linezolid.
What was searched and not found
Europe PMC searches for linezolid with caffeine, guarana or green tea returned no clinical study or case report of the combination. The imported statement is not supported by exact-pair evidence.
Practical approach
If your blood pressure is controlled, the inspected evidence gives no specific reason to stop green tea extract for a linezolid course. If you have high blood pressure or also use decongestants or other stimulants, pause the extract and follow the label's monitoring advice. Green tea extract has its own liver-injury reports, so report jaundice or dark urine regardless of linezolid.
Evidence and practical considerations
Side effects & toxicity
No evidence was found that linezolid increases stimulant or blood pressure effects of green tea extract; the label's pressor warning concerns sympathomimetic agents, and green tea evidence without linezolid shows both a reported blood pressure side effect and a small trial-measured decrease.
- Exact scope
- Green tea leaf extract supplements; caffeine content varies by product. with Linezolid tablets, oral suspension and intravenous injection (ZYVOX and generics); the reversible, nonselective MAO inhibition is a property of the drug at all routes.
- Medication form and route
- oral medication; intravenous medication; oral supplement
What remains uncertain
- No exact-pair study; conflicting supplement-only blood pressure data; label silent on caffeine.
Factors that may matter: Caffeine content and other stimulant sources; Existing high blood pressure; Concurrent decongestants; Liver disease.
Read the supporting source summaries
Source 1: current product label
dailymed.nlm.nih.gov · Source check Sep 22, 2026
Population: People prescribed linezolid
The label's blood pressure interaction warning covers sympathomimetic, vasopressor and dopaminergic agents; caffeine, tea and green tea extract are not mentioned.
How this applies: Exact linezolid (RxCUI 190376) at every marketed route; the label names tyramine, pseudoephedrine, phenylpropanolamine and serotonergic agents, not the supplements assessed here.
Absence from the label means no established interaction, not proof of safety.
Source 2: federal supplement safety guidance
nccih.nih.gov · Source check Sep 22, 2026
Population: General consumer population; no medication co-use data
Green tea contains caffeine; side effects of green tea extract supplements include nausea, constipation, abdominal discomfort and increased blood pressure; uncommon liver injury has been reported mainly with extract tablets or capsules.
How this applies: Documents caffeine content and a blood pressure side effect attributed to extract supplements alone.
Consumer summary; no linezolid or MAO inhibitor information.
Source 3: systematic review and meta-analysis
pubmed.ncbi.nlm.nih.gov · Source check Sep 22, 2026
Population: Adults in 13 randomised trials, 1995 to 2013.
Green tea lowered systolic pressure by 2.08 mmHg (95% CI 3.06 to 1.05) and diastolic by 1.71 mmHg (95% CI 2.86 to 0.56), with larger effects in extract studies and in people with baseline systolic pressure of 130 mmHg or more.
How this applies: Contrary to the imported statement: catechin-rich green tea products modestly lowered rather than raised blood pressure in people not taking an MAO inhibitor.
Meta-analysis abstract; participants were not taking linezolid; effects are small and product-dependent.
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 | |
| Prepared exact linezolid and Camellia Sinensis Leaf Extract article from inspected current labeling and original sources, with uncertainty stated. |
Article revision: e07069b48a8d2e26
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.