Feverfew and chamomile are not the same plant, but they look similar enough that people have confused them for centuries. Both belong to the daisy family (Asteraceae) and produce small white flowers with yellow centers, which is where the mix-up starts. They are, however, different species with different active compounds, different health benefits, and different safety profiles.
Why They’re So Easy to Confuse
The confusion runs deeper than just appearance. Feverfew’s scientific name is Tanacetum parthenium, but historically it has been classified under five different genera, including Matricaria, which is the genus chamomile (Matricaria chamomilla) belongs to. So in older botanical references, feverfew was literally categorized as a type of chamomile. That outdated classification still causes confusion in herbal product marketing and casual conversation.
Both plants produce daisy-like flowers about 2 cm across with white outer petals and yellow centers. Feverfew blooms from July through October. At a glance, a handful of either flower could pass for the other.
How to Tell Them Apart
The easiest way to distinguish the two is growth habit. Feverfew grows upright with sturdy, erect stems and deeply cut, aromatic leaves. Chamomile tends to be more prostrate, sprawling closer to the ground. Feverfew’s foliage has a strong, bitter scent when crushed, noticeably different from chamomile’s sweet, apple-like fragrance.
The plants are also used differently in herbal practice, which reflects a real botanical distinction: with feverfew, the leaves are the part used medicinally, while chamomile preparations rely on the flowers. If you’re growing both in a garden, feverfew comes in single-flowered (biennial) and double-flowered (perennial) varieties, giving it a bushier look than the more delicate chamomile.
Different Active Compounds
This is where the distinction matters most. Feverfew’s primary active compound is parthenolide, a substance that works by blocking a key inflammatory signaling pathway in your cells. It reduces production of inflammatory chemicals like prostaglandins and certain immune-signaling proteins. This anti-inflammatory action is what makes feverfew useful for specific conditions, particularly migraines.
Chamomile’s key compound is apigenin, which acts on completely different pathways. Apigenin has calming, mildly sedative properties, which is why chamomile tea is associated with relaxation and sleep rather than pain relief. These are fundamentally different chemicals doing fundamentally different things in the body.
Feverfew Is for Migraines
Feverfew has been studied primarily as a preventive treatment for migraines. Its anti-inflammatory properties, particularly its ability to reduce prostaglandin production and inhibit certain immune responses, appear to reduce the frequency and severity of migraine episodes when taken regularly. It’s typically sold as a capsule or tablet containing dried leaf extract. Feverfew is not a rescue treatment for a migraine already in progress. It’s taken daily over weeks as a preventive measure.
Chamomile Is for Anxiety and Sleep
Chamomile’s best-supported use is for anxiety. A systematic review of clinical trials found that oral chamomile has a meaningful calming effect, and not just for people with diagnosed anxiety disorders. Studies showed benefits for menstrual-related anxiety, postmenopausal anxiety symptoms, and anxiety linked to insomnia. In one trial, women who drank two cups of chamomile tea daily for 12 weeks saw improvements in both menstrual pain and the psychological distress that came with it.
Chamomile is most commonly consumed as a tea, which is a significant practical difference from feverfew. You’re unlikely to brew feverfew leaves into a bedtime drink, and drinking chamomile tea won’t help prevent migraines.
Safety Differences
Both herbs belong to the daisy family, so people with allergies to ragweed, chrysanthemums, or other plants in the Asteraceae family may react to either one. Beyond that shared concern, their safety profiles diverge.
Feverfew should not be taken during pregnancy because it may stimulate uterine contractions. Its safety during breastfeeding hasn’t been well studied. Feverfew may also interact with blood-thinning medications like warfarin. It has antiplatelet effects, meaning it can influence how your blood clots, so combining it with anticoagulants could theoretically increase bleeding risk. While clinical evidence for this interaction is still limited, the preclinical data is enough to warrant caution.
Chamomile is generally considered milder, though it can cause allergic reactions in sensitive individuals, particularly those with existing plant allergies. It’s one of the most widely consumed herbal teas in the world, which speaks to its relatively gentle safety profile for most people.
Neither Is FDA-Approved
In the United States, both feverfew and chamomile are classified as dietary supplements under the Dietary Supplement Health and Education Act (DSHEA). This means the FDA does not approve them for safety or effectiveness before they reach store shelves. Manufacturers don’t have to submit evidence of their claims to the FDA before selling products. The FDA’s role is limited to monitoring adverse event reports and inspecting manufacturing facilities after products are already on the market.
This regulatory reality applies equally to both herbs, so quality can vary significantly between brands. If you’re choosing a feverfew supplement for migraines, look for products that specify their parthenolide content, since that’s the compound responsible for the therapeutic effect.
Quick Comparison
- Scientific name: Feverfew is Tanacetum parthenium; chamomile is Matricaria chamomilla
- Key compound: Feverfew contains parthenolide (anti-inflammatory); chamomile contains apigenin (calming)
- Primary use: Feverfew for migraine prevention; chamomile for anxiety and sleep
- Part used: Feverfew leaves; chamomile flowers
- Common form: Feverfew as capsules or tablets; chamomile as tea
- Growth habit: Feverfew grows upright; chamomile grows low and spreading
- Pregnancy: Feverfew is contraindicated; chamomile is considered lower risk but not well studied