For the treatment of infestations with Trypanosomes, especially with T. congolense, T. vivax and T. brucei; infections with Babesiae, especially B. bovis, B. bigemina, B. ovis, B. canis etc: mixed infestations with Trypanosomes and Babesiae as well as infestations with drug-resistant strains of these parasites. It can also be tried in cases of Theileria annulata infestations.