“…The problem of combined toxicity pertains to the theoretically most complex and practically important challenges in preventive toxicology [ [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] ]. Over a number of years, it has been a subject of extensive studies for our research team [ [9] , [10] , [11] , [12] , [13] , [14] , [15] ]. One of the least studied aspects of this problem is the possibility that inorganic toxicants (lead compounds in particular) may have some effect on the biotransformation of organic ones and thus on their toxicokinetics and toxicodynamics.…”