Substitutes for PC-SPES
No substitutes are available for the original PC-SPES. Although manufacturers are selling supplements purporting to be substitutes, the PC-SPES mixture is patented and cannot be duplicated. There are no published reports of clinical trials of herbal mixtures that claim to be substitutes for PC-SPES. The only company that had a license from the patent holder to manufacture PC-SPES is no longer in business, and the product cannot be legally manufactured in the United States without the patent holder's permission. PC-SPES is not legally available in the United States.