Petasites root
Petasitidis rhizoma
Pestwurzelstock
Published July 27, 1990
Name of Drug
Petasitidis rhizoma, petasites root.
Composition of Drug
Petasites root consists of the dried underground parts of Petasites hybridus (L.) Ph. Gartn., B. Mey. et Scherb. [Fam. Asteraceae], as well as its preparations in effective dosage.
The drug contains sesquiterpenes such as petasin.
Petasites root also contains pyrrolizidine alkaloids with 1,2-unsaturated necine structure and their N-oxides.
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Uses
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Supportive therapy for acute spastic pain in the urinary tract, particularly if stones exist.
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Contraindications
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Pregnancy, nursing.
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Side Effects
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None known.
Interactions with Other Drugs
None known.
Dosage
Unless otherwise prescribed:
Daily dosage:
- Preparations equivalent to 4.5 - 7 g drug.
The daily dose must not exceed 1 g (mcg) of pyrrolizidine alkaloids with 1,2-necine structure, including their N-oxides.
Mode of Administration
Extracts obtained with ethanol or lipophilic solvents and other galenical preparations for internal use.
Duration of Administration
Not longer than 4 - 6 weeks per year.
Action
Antispasmodic
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