Coltsfoot: Uses, Benefits, Dosage & Safety
Last updated: June 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy
Quick summary
Coltsfoot is a traditional cough herb, but it contains liver-toxic compounds, so modern use is discouraged unless those compounds are removed.
What is Coltsfoot?
Coltsfoot (Tussilago farfara) is a plant historically used for coughs and sore throats — its botanical name literally means 'cough dispeller'.
What Coltsfoot is commonly used for
In supplements, Coltsfoot is most often included for respiratory & lung health support. It is used as nutritional support, not as a treatment for any medical condition — the distinction matters, because the claims on a sales page are often stronger than the evidence allows.
How Coltsfoot works
Its mucilage can soothe irritated throats, the basis for traditional cough use, but the plant also contains pyrrolizidine alkaloids that are toxic to the liver.
What the evidence says
Here's an honest snapshot of what published research suggests about Coltsfoot — including where the evidence is limited.
- Any soothing effect is offset by safety concerns; because of its pyrrolizidine alkaloids, health authorities discourage coltsfoot use unless it is a certified alkaloid-free product.
- Study quality and doses vary, and a result seen in research doesn't guarantee the same for any individual — use the sources below to check the current evidence on Coltsfoot rather than relying on marketing claims.
Typical dosage used in studies
Traditional teas were used short-term; given the toxicity, routine use is not recommended. This is general information from research, not a personal recommendation or a dosing instruction.
Side effects and safety
Coltsfoot's pyrrolizidine alkaloids can cause serious liver damage and are potentially carcinogenic. It is avoided in pregnancy, breastfeeding, liver disease and generally discouraged unless PA-free. As with any supplement, it's sensible to introduce Coltsfoot on its own, use a trusted brand, and stop if you notice any reaction.
Medication interactions and who should avoid Coltsfoot
Medication & safety check
Herbs interact with prescription medicines more often than people expect — affecting drug levels, bleeding, blood pressure, blood sugar or sedation — and Coltsfoot is no exception. If you take any regular medication, are pregnant or breastfeeding, or manage a health condition, confirm Coltsfoot is appropriate for you before starting.
This is general information, not personal medical advice. If you take any medication, are pregnant or breastfeeding, or have a health condition, confirm it's safe to use Coltsfoot with your doctor or pharmacist first.
Sources & further reading
For authoritative background and the current research base on Coltsfoot, consult:
- PubMed — search the research on Coltsfoot
- NCCIH — Herbs at a Glance
- MedlinePlus — herbs & supplements
- MedlinePlus — drugs, herbs & supplements
Frequently asked questions
Does Coltsfoot actually work?
Any soothing effect is offset by safety concerns; because of its pyrrolizidine alkaloids, health authorities discourage coltsfoot use unless it is a certified alkaloid-free product. As with most supplements, results vary between people and the marketing is often stronger than the evidence — so it's worth checking the research before relying on it.
Is Coltsfoot safe to take?
For most healthy adults at normal doses it's generally well tolerated, but there are real cautions. Coltsfoot's pyrrolizidine alkaloids can cause serious liver damage and are potentially carcinogenic. It is avoided in pregnancy, breastfeeding, liver disease and generally discouraged unless PA-free. If you take medication, are pregnant or breastfeeding, or have a health condition, check with a doctor or pharmacist first.
What is Coltsfoot used for?
In supplements, Coltsfoot is mainly included for respiratory & lung health support — as nutritional support, not as a treatment for any medical condition.
Where you'll find Coltsfoot
On FactoWiki, Coltsfoot is the kind of ingredient you'll see discussed in these supplement categories. Each category guide breaks down what the evidence does and doesn't support.
Related ingredients to explore
Ingredients often studied or formulated alongside Coltsfoot — useful for understanding the full picture of a formula.