Zimecterin Gold Removes roundworms, tapeworms and bots with a single dose. Contains ivermectin 1.55% and praziquantel 7.75%. Broad-Spectrum Control: Zimectrin Gold Paste kills important internal parasites, including tapeworms, bots and the arterial stages of S. vulgaris, with a single dose. Zimectrin Gold Paste is a potent antiparasitic agent that is neither a benzimidazole nor an organophosphate.