Quercetin
flavonoid
What it isDietary flavonoid antioxidant and mast cell stabilizer.
Why this oneIt is among the most studied flavonoids for allergic and inflammatory conditions.
What limits itPoor oral bioavailability, and it inhibits CYP3A4 and P-gp at supplement doses. Clinical evidence remains weak.
Used for
- dietary flavonoid (no approved indication)
- allergic rhinitis and antioxidant supplementation (limited evidence)
NO BOXED WARNINGS
Principal riskPoor oral bioavailability, and it inhibits CYP3A4 and P-gp at supplement doses
Classes and tags
Available strengths
- cap 500 mg
Cost
Quercetin (FLAVONOID)
| Strength | #/mo | generic $/mo | CostPlus | |
|---|---|---|---|---|
| 500 mg | cap | 90 TID | not offered |
NADAC is a voluntary CMS survey of what retail community pharmacies pay for the drugs they stock. Quercetin is dispensed outside retail pharmacies, so it rarely appears on surveyed invoices.
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Self-check
- Quercetin: What limits oral exposure?
Poor bioavailability. - Quercetin: How strong is the clinical evidence?
Weak.