from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A broad-spectrum benzimidazole anthelmintic used against gastrointestinal parasites.


Sorry, no etymologies found.


  • However, resistance to two of the three dewormer drug classes -- benzimidazoles (i.e., fenbendazole and oxibendazole) and pyrimidines (i.e., pyrantel) has been documented, and there have been some early indications of resistance to macrocyclic lactones (ivermectin/moxidectin) on a few farms.

    Thoroughbred News |

  • They advise that instead of ivermectin, fenbendazole or pyrantel are now the drugs of choice for use against P. equorum. Headlines

  • In contrast, the FECRT 14 days after treatment was 100 per cent in the fenbendazole treated group, and more than 90 per cent in the small group of foals treated with pyrantel. Headlines

  • On that basis, only the five-day course of fenbendazole will deal with migrating large strongyles and all the encysted stages of the small strongyle. Headlines

  • The 10mg dose rate for fenbendazole applies only to younger horses, as this level is needed to kill the commonest ascarid, P. equorum. Headlines

  • Some may opt for a double course of fenbendazole for young horses, but with a half-strength first dose at 5mg per kilogram of body weight. Headlines

  • Only moxidectin or a five-day course of fenbendazole will deal with encysted strongyles. Headlines

  • Only two drenches are known to do the trick against these encysted larvae - moxidectin at the above-mentioned dose rate of 0.4 milligrams per kilogram of horse; and the five-day course of fenbendazole at the rate of 10 millgrams per kilogram of body weight each day. Headlines

  • The label will likely show the active ingredient as fenbendazole, oxfendazole or oxibendazole. Headlines

  • Another veterinarian has suggested trying the five-day deworming program with fenbendazole for encysted larvae first. News


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