Botanicals & Herbs

Feverfew

Also known as: Tanacetum parthenium, Feverfew extract, Parthenolide

The migraine daisy — parthenolide chemistry with mixed but historically significant migraine-prevention trials.

By IngredientWiki Editorial Team
Fact-checked by IngredientWiki Editorial Team
Updated 2026-09-26
2 min read

In short

Feverfew (Tanacetum parthenium) is a daisy-family herb whose traditional name — febrifuge, fever-reducer — is misleading; its real clinical identity is migraine prevention. The active compound parthenolide appears to calm the trigeminal-vascular system and damp the inflammatory signaling involved in migraine, and trials are famously split: several classic studies found meaningful reductions in migraine frequency, while modern standardized-extract trials have been mixed. It remains one of the best-known herbal migraine options, best for those who prefer botanicals — with consistent use, not acute dosing, being the point.

Daisy-family herb; the active marker is parthenolide
Historically studied for migraine prevention, not acute relief
Trials split: classic positive, modern mixed
Regular daily use for months — not an as-needed remedy

What is Feverfew?

Feverfew is the herb that gave botanical migraine prevention its name — and its cautionary methodological lesson. The classic trials of the 1980s reported meaningful reductions in migraine frequency; the modern era of standardized extracts has produced a more mixed picture, leaving feverfew with a real but contested evidence base. The pharmacology remains plausible and interesting: parthenolide, its signature compound, modulates serotonin-mediated vascular signaling and the inflammatory pathways implicated in migraine. For the migraine sufferer weighing options, feverfew is the herbal preventive with the longest track record — provided it is used preventively, consistently, and with patience.

Where it comes from

Natural sources

Leaves of Tanacetum parthenium, native to southeastern Europe and western Asia
Parthenolide, a sesquiterpene lactone, is the principal active compound
Traditional European use for fevers, headache, and menstrual complaints

How it's made

Sold as dried leaf, capsules, and extracts standardized to parthenolide content (0.2–0.7%).

What it does in products

Benefits

Migraine prevention

moderate evidence

Classic trials showed reduced migraine frequency with feverfew leaf, but modern standardized-extract trials have been mixed — the overall evidence is modest and contested.

Rheumatoid arthritis (traditional)

emerging evidence

Traditional anti-inflammatory use has limited, older trial support; not a modern first-line consideration.

Headache support (general)

emerging evidence

Used traditionally for non-migraine headaches; dedicated evidence is sparse.

Side effects & safety

Mouth ulcers (uncommon)Reported with chewing fresh leaves; less common with capsules.

Stomach upset (uncommon)Usually mild; take with food.

'Post-feverfew syndrome' on abrupt stopping (rare)Rebound headache and muscle stiffness reported after long-term use — taper off.

Safety considerations

Avoid — traditional cautions (uterine stimulation) and insufficient data.
Theoretical interaction with anticoagulants (antiplatelet activity); no firmly established drug interactions.
Not for: Asteraceae family allergy (ragweed, daisies)
Not for: Pregnancy
Not for: Planned surgery (antiplatelet caution)

How it's used

In supplements

Migraine prevention: 50–100 mg of dried leaf equivalent daily (often standardized to 0.2–0.7% parthenolide), for at least 3–6 months before judging. Taper gradually if stopping after long-term use.

Regulatory status

Dietary supplement under DSHEA; no drug approval.
GRAS (generally recognized as safe) for food use.

Why feverfew's trials split — and what it teaches about herb quality

Feverfew's literature contains a case study in herbal research: the positive classic trials used whole leaf preparations, while later negative or mixed trials used extracts standardized to parthenolide alone. Part of the discrepancy may be quality — feverfew products vary notoriously in parthenolide content, with testing finding many below claimed levels — and part may be that the leaf's full chemistry matters, not one marker compound. The practical lesson applies beyond feverfew: standardized markers are useful quality signals but not the whole herb, and botanical trial results depend heavily on what exactly was tested. Choose reputable products, use them preventively, and read mixed evidence as 'worth trying', not 'proven'.

Frequently asked questions

Does feverfew actually prevent migraines?

The classic trials say yes, the modern ones are mixed — so the honest answer is 'possibly, modestly, for some people'. It works preventively with months of consistent use, not as an acute migraine treatment.

How long does feverfew take to work?

Prevention trials ran months — expect to use it daily for at least 3–6 months before judging. It is a background preventive, not a painkiller for the moment of attack.

Can I stop feverfew suddenly?

After long-term use, taper gradually — abrupt stopping has occasionally produced rebound headaches and muscle symptoms known as 'post-feverfew syndrome'. A few weeks of tapering avoids the question entirely.

The bottom line

Feverfew is the classic herbal migraine preventive — plausible chemistry, contested trials, and a usage pattern that demands months of consistency rather than acute relief. Worth trying for the botanically inclined; worth skepticism without the patience.

References

Feverfew and migraine — literature search. PubMed (National Library of Medicine). https://pubmed.ncbi.nlm.nih.gov/?term=feverfew+migraine+randomized
Parthenolide pharmacology (review). PubMed (National Library of Medicine). https://pubmed.ncbi.nlm.nih.gov/?term=parthenolide+pharmacology
Feverfew product quality analysis. PubMed (National Library of Medicine). https://pubmed.ncbi.nlm.nih.gov/?term=feverfew+parthenolide+content+analysis
Parthenolide compound summary. PubChem (National Library of Medicine). https://pubchem.ncbi.nlm.nih.gov/compound/7251185