The Collaborative International Dictionary of English v.0.48:

Concoctive \Con*coct"ive\, a.
   Having the power of digesting or ripening; digestive.
   [1913 Webster]

         Hence the concoctive powers, with various art,
         Subdue the cruder aliments to chyle.     --J.
                                                  Armstrong.
   [1913 Webster]