Catharanthine Products | Cleanchem - Catharanthine is a vinca alkaloid found in the plant Catharanthus roseus (periwinkle) and is used in the synthesis of anti-cancer drugs like vincristine and vinblastine. It works by disrupting microtubule formation, inhibiting cell division, and leading to cell death. Catharanthine has potential uses in the treatment of leukemia and lymphoma. Side effects of related drugs include neuropathy, hair loss, and gastrointestinal distress.