Coltsfoot leaf (Farfarae folium)

Published July 27, 1990.
List of German Commission E Monographs (Phytotherapy)

Huflattichblätter

Name of Drug

Farfarae folium, coltsfoot leaf.

Composition of Drug

Coltsfoot leaf consists of the fresh or dried leaves of Tussilago farfara L. [Fam. Asteraceae], as well as its preparations in effective dosage.

The drug contains mucilage and tannins. Coltsfoot leaf also contains varying amounts of pyrrolizidine alkaloids with a 1,2-unsaturated necine structure and their N-oxides.

Uses

Acute catarrh of the respiratory tract with cough and hoarseness, acute, mild inflammation of the oral and pharyngeal mucosa.

Contraindications

Pregnancy, nursing.

Side Effects

None known.

Interactions with Other Drugs

None known.

Dosage

Unless otherwise prescribed:

Daily dosage:

4.5 - 6 g of drug; equivalent preparations. The daily dosage of coltsfoot tea (drug) and of tea mixtures must not exceed 10 µg pyrrolizidine alkaloids with 1,2 unsaturated necine structure, including their N-oxides.

The daily dosage for extracts and pressed juice from fresh plants must not be more than 1 µg of total pyrrolizidine alkaloids with 1,2 unsaturated necine structure, including their N-oxides.

Mode of Administration

Comminuted drug for infusions, pressed plant juice or other galenical preparations for internal use.

Duration of Administration

Not longer than 4 - 6 weeks per year.

Unless otherwise stipulated:

Ointments or other preparations for external use are made up with 5 - 20 percent of the drug and prepared accordingly. The daily dose should not exceed more than 100 µg pyrrolizidine alkaloids with 1, 2-unsaturated necine structure including their N-oxides.

Actions

Inhibits inflammation
Furthers the formation of callus
Antimitotic.