Category: Active Pharmaceutical Ingredient ( API) General information: Podophyllum Resin is the resin obtained from rhizomes and roots of Podophyllum hexandrum. It contains not less than 50 % of total aryltetralin lignans, calculated as podophyllotoxin. Pharmacopoeial Reference: B.P Storage: Podophyllum resin should be protected from light. On exposure to light, or to temperatures above 25° C it becomes darker in colour. .