Polypodium Vulgare

Scientific Summary

Polypodium vulgare (the common polypody) is a leafy fern whose rhizomes and roots are used in herbal preparations. It is taken primarily as an adjunctive treatment for colds, influenza, and to support immune function, stamina, and endurance; it also appears in traditional use for chronic diarrhea, edema, abnormal uterine bleeding, diabetes, and as a mild cardiotonic. Because extracts contain podophyllin, it can cause nausea, vomiting, and potential toxicity, so it should not be used in large amounts, for prolonged periods, or by pregnant women without professional guidance.

Source: Trease & Evans Pharmacognosy 16th ed, WHO Monographs on Selected Medicinal Plants (Vols 1-3)