Mullein (Verbascum thapsus)

What is Mullein (Verbascum thapsus)?

Mullein is a sturdy biennial plant with large, soft, woolly leaves and tall yellow flower spikes that grow in fields and roadsides across Europe, Asia, and North America. It has been used in herbal medicine for more than 2,000 years, appearing in ancient Greek, Roman, Persian, and Indigenous American traditions — almost always for the same purpose: helping people breathe easier. The leaves and flowers are the most medicinally used parts, though the roots and seeds have traditional applications too.

How does Mullein (Verbascum thapsus) work?

Mullein's thick, gel-like mucilage coats and soothes irritated airways, helping to calm the urge to cough and ease raw, inflamed throat and bronchial tissue. Its saponins act as natural expectorants — they thin and loosen sticky mucus so it can be cleared more easily from the lungs. The flavonoids and iridoid glycosides in the plant add anti-inflammatory and mild antimicrobial effects that may help the body fight off respiratory infections.

What forms does Mullein (Verbascum thapsus) come in?

Leaf tea is the most traditional and widely used form — steep 1–2 teaspoons of dried leaf in hot water for 10–15 minutes and always strain carefully through a fine cloth to remove the tiny leaf hairs. Tinctures offer a more concentrated, convenient option. Capsules are available but may deliver less of the soothing mucilage than liquid forms. Ear oil (mullein flowers infused in warm olive oil) is a popular folk remedy for ear pain. Smoking dried mullein leaf is a historical use for lung complaints but is not recommended.

Where it comes from:

Mullein's medicinal use spans civilizations. Ancient Greeks used it for lung disease; the Roman naturalist Dioscorides recommended it for coughs. Indigenous American tribes including the Cherokee, Navajo, and Mohegan adopted it after European contact and used it extensively for respiratory illness, as did Appalachian folk healers. In Ayurvedic medicine a related species is used similarly. It was official in the U.S. Pharmacopeia in the 19th century and remains one of the most consistently used respiratory herbs across cultures.

What does Mullein (Verbascum thapsus) help with?

Mullein is a tall wildflower with soft, velvety leaves. It grows wild across Europe and Asia. Folk healers in Europe, Indigenous America, India and Persia have used its leaves and flowers for lung and throat trouble for more than 2,000 years.

• A cough that will not settle, and bronchitis
  Long traditional use · not yet tested in trials — long, cross-cultural traditional use plus lab work on its plant compounds; no human trials on file. Mullein leaf holds mucilage, a slick gel. Lab work links that gel to a coating effect on the airway lining, which may calm the tickle that sets off coughing fits. Its saponins are thought to loosen thick mucus. We hold no human trials, so no dose or effect size in people can be quoted.
  Evidence grade insufficient · Traditional tier T3
• Chest and sinus congestion, thick mucus you cannot clear
  Long traditional use · not yet tested in trials — lab work on saponins plus traditional use; no human trials on file. Saponins are soapy plant compounds in mullein. In lab terms they act as expectorants, meaning they thin sticky mucus so it drains. Folk use points to colds and stuffy sinuses. No human study on file has measured whether mucus clears faster in real people.
  Evidence grade insufficient · Traditional tier T3
• Sore, scratchy throat
  Long traditional use · not yet tested in trials — traditional use plus lab work on mucilage; no human trials on file. Mullein leaf tea is slippery because of its mucilage. Lab work suggests that gel forms a soft layer over sore tissue. Tradition holds that this eases the scratch-and-irritate cycle. No trial in people has tested it, so relief is not something we can promise.
  Evidence grade insufficient · Traditional tier T3
• Colds and flu symptoms
  Long traditional use · not yet tested in trials — laboratory studies only, on extracts in dishes rather than in people. In lab studies, mullein extracts showed activity against certain airway viruses and bacteria. Those tests were done outside the body. Nothing on file shows the same thing happens when you drink the tea. There are no human trials, no doses and no recovery times to report.
  Evidence grade insufficient · Traditional tier T3
• Sinusitis: pressure, stuffiness and facial ache
  Long traditional use · not yet tested in trials — traditional use of tea and steam; no human trials on file. Herbalists have long used mullein tea, or steam from it, for blocked sinuses. The idea is that it thins mucus and calms the swollen lining. Both of those steps rest on lab work and tradition, not on human studies. No trial has measured sinus pressure before and after.
  Evidence grade insufficient · Traditional tier T3
• Earache during an ear infection
  Long traditional use · not yet tested in trials — traditional use of mullein flower oil, often with garlic; no human trials on file. Mullein flower oil, warmed and often mixed with garlic, is an old remedy for ear pain. Tradition credits mild germ-fighting and anti-swelling effects from the flowers, plus the soothing warmth of the oil. We hold no human trial of ear drops of this kind. Tradition is firm on one point: never put oil in the ear unless the eardrum is whole.
  Evidence grade insufficient · Traditional tier T3
• Asthma and wheezing
  Long traditional use · not yet tested in trials — folk and traditional use only; no human trials on file. Mullein has a long past as an asthma herb in folk medicine. The proposed path is less swelling in the airways, with the passages opening and settling. That idea has not been tested in a human trial on file. Mild flares are where tradition placed it, but no study backs that up.
  Evidence grade insufficient · Traditional tier T3
• Day-to-day COPD symptoms, like mucus and coughing
  Long traditional use · not yet tested in trials — traditional herbal practice only; no human trials on file. Herbalists have used mullein for the ongoing cough and mucus of long-term lung disease. The reasoning stacks its mucus-clearing, anti-swelling and soothing effects together. That reasoning is not the same as proof. No human study on file has looked at mullein in people with COPD, and it is not a stand-in for prescribed medicine.
  Evidence grade insufficient · Traditional tier T3

What Mullein (Verbascum thapsus) has not been shown to do

• No human study on file shows mullein clears an ear infection or does the work of antibiotic drugs.
• No human study on file shows it can take the place of an inhaler or other asthma medicine, and it has not been tested in a severe attack.
• It has not been shown to replace prescribed COPD medicines or to slow that disease.
• No human study on file shows it shortens a cold or the flu; the germ-fighting work was done in the lab only.
• It has not been shown to be safe or useful as an oil in the ear when the eardrum is burst or torn.
• No human study on file shows it heals damaged lungs or cures long-term bronchitis.

How to read this:

Grades run from A down to insufficient. An A means several good human trials agree. Insufficient means there is no human study at all, just lab work, animal work or tradition. Every use on this page sits at insufficient. That is not the same as saying mullein does nothing. It means no one has yet measured it in people, so we cannot tell you how much it helps, or whom. This page is a reference, not medical advice, and not a plan for treating illness. Talk with a clinician about your own case, above all for ear pain, asthma or long-term lung disease.

What can Mullein (Verbascum thapsus) help prevent?

• Recurrent ear infections in children: mullein flower ear oil has been studied as a preventive adjunct between infection episodes, with modest supportive evidence

Which foods are rich in Mullein (Verbascum thapsus)?

Mullein is an herbal plant and is not found as a component of everyday foods. To support the same respiratory and anti-inflammatory pathways, focus on: (1) Honey — raw honey coats and soothes inflamed airways and has well-documented antimicrobial properties; (2) Ginger — a powerful natural anti-inflammatory that helps open airways and clear mucus; (3) Garlic — contains allicin, which has antimicrobial effects relevant to respiratory infections; (4) Onions — rich in quercetin, which reduces airway inflammation; (5) Thyme — a culinary herb with the same expectorant and antimicrobial properties used medicinally for coughs. Avoid dairy during active respiratory congestion, as it may thicken mucus in some people. Foods to limit: Dairy products (may thicken mucus during active respiratory congestion in sensitive individuals), Refined sugar (promotes inflammation and may worsen immune response during infection), Alcohol (dries out mucous membranes and may worsen airway irritation).

What are the side effects of Mullein (Verbascum thapsus)?

• Throat or skin irritation from leaf hairs if tea is not well strained
• Contact dermatitis (rare skin rash with direct skin contact, especially in sensitive individuals)
• Ear canal irritation if ear oil enters a perforated eardrum: never use ear drops with a ruptured eardrum
• Mild allergic reactions possible in people sensitive to plants in the Scrophulariaceae family
• Safety in pregnancy and breastfeeding is not well established — use with caution

Good to know:

Mullein has an excellent safety record across millennia of use and is considered very safe for most people. The main practical issue is straining leaf tea properly — the fine hairs on the leaves can irritate the throat and mucous membranes if they get into the drink.

How much Mullein (Verbascum thapsus) should you take?

• Recommended daily: Dried leaf tea: 1.5–2 grams steeped in 150 ml hot water, 3–4 times daily (always strain through fine cloth or coffee filter). Tincture (1:5): 4–8 ml up to 3 times daily. Capsules: follow product label, typically 400–500 mg 2–3 times daily. Ear oil: 2–4 drops warmed oil in affected ear, 1–3 times daily — only if eardrum is intact.
• Best time of day: Tea works well in the morning to clear overnight mucus buildup and again at bedtime to calm nighttime cough. Ear oil is best applied at bedtime with a cotton ball to hold it in place.
• With or without food: Can be taken with or without food — the leaf tea may be easier on the stomach when taken between meals or with a light snack
• Time to effect: Acute symptom relief (cough, throat soothing) often noticed within 1–3 days; ear pain relief typically within 24–48 hours; ongoing respiratory support best assessed after 1–2 weeks of consistent use
• How long to take it: For acute respiratory illness, use for the duration of symptoms (typically 1–2 weeks). For ongoing respiratory support, cycling on for 4–6 weeks and off for 2 weeks is a sensible traditional approach. No firm maximum duration is established, but extended use should be discussed with a healthcare provider.