A vet prescription is required for the medicine you have chosen for the treatment of mixed infections in cats by immature and adult cestodes and nematodes of the following species cestodes dipylidium caninum taenia spp echinococcus multilocularis and nematodes toxocara cati ancylostoma tubaeforme prevention of heartworm disease dirofilaria immitis if concomitant treatment against cestodes is indicated if you do not yet have a prescription then you can print out the following bl