The exact composition of Cancell/Cantron/Protocel is unknown. The U.S. Food and Drug Administration (FDA) has listed the components as inositol, nitric acid, sodium sulfite, potassium hydroxide, sulfuric acid, and catechol. Reviewed in [1,2] The original manufacturer also identified "crocinic acid" as a component; Reviewed in  however, information about the nature and origin of this chemical has not been provided, and it does not appear to be a known compound. An independent analysis of one formulation of Cancell/Cantron/Protocel found 12 different compounds, none of which is known to be effective in treating any form of cancer. Reviewed in 
A classification system has been developed by the National Cancer Institute's PDQ Adult Treatment Editorial Board to allow the ranking of human cancer treatment studies according to statistical strength of the study design and scientific strength of the treatment outcomes (i.e., endpoints) measured. This classification system has been adapted to allow the ranking of human studies of complementary and alternative medicine treatments for cancer. The purpose of classifying studies in this way is to...
Before researchers can conduct clinical drug research in the United States, they must file an Investigational New Drug (IND) application with the FDA. Entelev, which is the original name of the mixture, was assigned an IND number (IND #20258) by the FDA in 1982. The IND currently remains inactive because information about the product's composition and studies showing its therapeutic effectiveness in animals have not been provided to the FDA. Reviewed in  In 1989, the FDA was granted a permanent injunction against both principal manufacturers of Cancell/Cantron/Protocel prohibiting them or their agents from distributing the mixture, which was judged an unapproved new drug. Reviewed in 
Cancell/Cantron/Protocel has been administered orally, rectally, and topically. Reviewed in  Topical skin application is accomplished by dampening a cotton pad with the liquid and taping the moistened pad to the wrist or the ball of the foot after first treating the area with dimethyl sulfoxide. Reviewed in  Cancer patients have also been advised to take bromelain, which is a digestive aid, and to avoid high intakes of vitamins C and E while undergoing treatment with Cancell/Cantron/Protocel. Reviewed in [1,3]
Questionable methods of cancer management: Cancell/Entelev. CA Cancer J Clin 43 (1): 57-62, 1993 Jan-Feb.
Cassileth BR, ed.: The Alternative Medicine Handbook: The Complete Reference Guide to Alternative and Complementary Therapies. New York, NY: WW Norton & Company, 1998.
Cancell Alternative Cancer Treatment. Cottonwood, Ariz: Winter Works, 2002. Available online. Last accessed January 18, 2013.
U.S. District Court for the Eastern District of Michigan.: Complaint for Permanent Injunction: United States of America, Plaintiff, v. James V. Sheridan and Edmund J. Sopcak, Defendants. 21st February, 1989.
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