Disclosed herein is the use of triazines of formula (I) or (II) wherein R1 represents R3-SO2- or R3-S- R2 represents alkyl, alkoxy, halogen or SO2N(CH3)2 R3 represents haloalklyl R4 and R5 independently of one another represent hydrogen or Cl and R6 represents fluorine or chlorine, for the preparation of compositions for the transdermal treatment of infections of animals or humans with coccidian, where the active substance of the formula (I) or (II) for transdermal application is used in a dose which is no more than 150% of the corresponding oral dosage rate under otherwise identical conditions.
