We manufacture two formulas; one formula has Cat’s Claw in the tea.  We also manufacture an Original formula which has no Cat’s Claw in the tea but has all of the same qualities of the Cat’s Claw formula.  If you are taking an immune suppressant for any reason, i.e. an organ transplant, you should not take anything  to give the immune system a boost.  It would be safe for you to take the Original Tea instead.