Quite a few substances used in traditional medicine in China or other countries have received Food and Drug Administration (FDA) approval as cancer drugs… and their numbers are growing. Some examples are:
Arsenic trioxide, made from arsenic sulfide ore, has been used therapeutically for more than 2,400 years. Following promising reports from China, the agent was tested in clinical trials and received FDA approval in 2000 for patients with acute promyelocytic leukemia who have not responded to other therapies or whose disease has recurred.
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