Fenbendazole - MIB #72

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Revised November 2017

Approved Brands

  1. Safe-Guard Premix 20% contains fenbendazole at 200 g/kg (Intervet Canada Corp.)

Approved for use

In mash or pellet feed for swine; cattle.

Approved claims

For swine - Claim 1
For cattle - Claim 2

Claim 1: For the treatment of parasitic infections due to the following internal parasites in growing pigs, sows, gilts and boars:

Lung worms: Adult stage Metastrongylus apri and M. pudendotectus.

Small stomach worms: Adult stage of Hyostrongylus rubidus.

Intestinal worms: Adult and developing larval stages of the roundworm Ascaris suum, the whipworm Trichuris suis and the adult stage of the nodular worm Oesophagostomum dentatum.

Level of Drug:

A total of 9 mg fenbendazole per kg body weight to be administered over a period of 3 to 12 days.

Directions (required to appear on feed labels):

Feed the total dose (equivalent to 9 mg fenbendazole per kg body weight) over a period of 3 to 12 days as the sole medicated feed.

Additional directions for use that are not required to appear on feed labels:

Thoroughly mix 125 to 500 grams of Safe-Guard Premix 20% with other feed ingredients to make one tonne of complete swine feed, as per the table below. The Safe-Guard Premix 20% must be thoroughly mixed in feeds before use.

Amount (grams) of Safe-Guard 20% premix per tonne of feed Amount of fenbendazole (mg) per kg of complete feed Treatment period Table Note 1
500 100 3 days
250 50 6 days
125 25 12 days

Table Note

Table Note 1

Based on a daily feed intake of 3 kg of medicated feed per 100 kg body weight.

Return to table note 1  referrer

Additional information (not to appear on feed labels)

For feed manufacturers:

  • kg of premix will deworm 111 000 kg (244 900 lb) of swine.

Additional information to be added to feed labels

  • No prior withdrawal of feed or water is necessary.
  • No other medicated feed should be administered during the period of time when feed medicated with fenbendazole is fed.
  • If 3 kg per 100 kg of live body weight of the pigs being treated is not sufficient to maintain the animals for 24 hours, additional non-medicated feed may be offered to appetite.
  • When the above mixing and feeding directions are followed, each pig will receive 9 mg fenbendazole per kg of live body weight during the 3-12 day treatment period.
  • Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasites.

Caution:

  1. Do not use in feed containing pellet binding agents (Required on premix and supplement labels only).

Warnings:

  1. No withdrawal period is required for swine when treated at the recommended dose of 9 mg fenbendazole per kg body weight over a period of 3 to 12 days.
  2. Keep out of reach of children (Required on premix and supplement labels only).

Claim 2: For the treatment of parasitic infections due to the following internal parasites in cattle:

Lung worms: Adult and developing 4th stage larvae of Dictyocaulus viviparus.

Stomach worms: Adult and developing 4th stage larvae of Haemonchus contortus and Ostertagia ostertagi, and the adult stage of Trichostrongylus axei.

Intestinal worms: Adult and developing 4th stage larvae of Cooperia punctata, C. oncophora, C. pectinata, C. mcmasteri, Trichostrongylus colubriformis, Nematodirus helvetianus, Bunostomum phlebotomum and Oesophagostomum radiatum.

Level of Drug:

mg fenbendazole per kg body weight fed as a single dose or divided and fed over a period of one to six days.

Directions (required to appear on feed labels):

Level of the drug in the complete feed is to be such that cattle will consume a dosage of 5 mg fenbendazole per kilogram of body weight (BW) in a single dose or over a one to six day period for beef cattle, dairy heifers and dry dairy cows and administered to lactating dairy cattle as a single dose or divided and fed over a treatment period of 4 to 6 days.

Additional directions for use that are not required to appear on feed labels:

The required amount of Safe-Guard Premix 20% needed is determined using the following formula:

Amount of Safe-Guard Premix 20% (kg) required
=
Total animal weight (kg) × 5 mg/kg BW
÷
200 000 mg of fenbendazole per kg of Safe-Guard 20% Premix

Must be thoroughly mixed in feeds before use.

Additional information (not to appear on feed labels)

For feed manufacturers:

  • kg of premix will deworm 200 000 kg (440 920 lb) of cattle.

Additional information to be added to feed labels

  • When the above mixing and feeding directions are followed, each animal will receive 5 mg of fenbendazole per kilogram of body weight.
  • Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasites.

Warning:

  1. Cattle treated with Safe-Guard must not be slaughtered for food use for at least 13 days after the last treatment with this drug at the recommended dose of 5 mg fenbendazole per kg body weight
  2. No milk withholding time is required when the drug is used at the recommended dose of 5 mg fenbendazole per kg body weight.
  3. Keep out of reach of children (Required on premix and supplement labels only).

Caution:

  1. Do not use in feeds containing pellet binding agent (Required on premix and supplement labels only).

Accepted Compatibilities

Nil

Date modified: