The short answer. There isn't much data on Butterbur yet — 5 mentions, 1 with a clear outcome — so treat these numbers as anecdotal. It is well studied — 5 meta-analyses on PubMed.
From 5 mentions in total — the rest didn't say how it went and aren't counted.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: The results of this systematic review suggest that several herbal medicines, via their multifactorial physiological influences, present as potential options to enhance the treatment of migraine. However, further high-quality research is essential to examine their efficacy and safety as a treatment for migraine.
PubMed 32310327 ↗Conclusion: Some alternative therapies show promise as potential treatments for sinusitis and rhinitis, mostly compared to placebo. Comparisons to traditional therapies are lacking. For other alternative therapies, many websites included unsubstantiated claims of benefit and ignored potential side effects for which patients should be warned appropriately.
PubMed 32104974 ↗Conclusion: There is encouraging evidence suggesting that P hybridus may be an effective herbal treatment for seasonal (intermittent) AR. However, independent replication is required before a firm conclusion can be drawn because of the financial support from the manufacturer of P hybridus extract to the 3 large trials. There are also promising results generated for other herbal products, particularly Aller-7, Tinospora cordifolia, Perilla frutescens, and several Chinese herbal medicines. Although these results are confined to the paucity of data and the small sample size, confirmation in larger and more r
PubMed 18219828 ↗Conclusion: An evidence-based systematic review including written and statistical analysis of scientific literature, expert opinion, folkloric precedent, history, pharmacology, kinetics/dynamics, interactions, adverse effects, toxicology, and dosing.
PubMed 16520304 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“From what I’ve heard supplementing with Butterbur works for an anti histamine and evening primrose oil for skin irritation and flaking.”
“Butterbur and Feverfew can supposedly help with migraines though I have no experience with them.”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate