A pale pink smooth suspension for oral administration. Each ml of Zerofen 2.5% contains 25 mg fenbendazole.

Zerofen 2.5% is a broad spectrum anthelmintic for the control of mature and developing immature forms of the major species of roundworms in sheep and cattle.

In sheep it is effective against benzimidazole susceptible strains of the following parasites:

Gastro-intestinal roundworms: Ostertagia, Haemonchus, Trichostrongylus, Nematodirus, Cooperia, Oesophagostomum, Chabertia, Bunostomum and Strongyloides species.

Lungworms: Dictyocaulus filaria.

It is usually effective for the control of tapeworms, Moniezia spp, in sheep. The product may be useful for the control of Trichuris in sheep.

In cattle it is effective against the following parasites:

Gastro-intestinal roundworms: Ostertagia, Cooperia, Trichostrongylus, Nematodirus, Haemonchus, Oesophagostomum, Bunostomum, Strongyloides and Trichuris species.

Lungworms: Dictyocaulus viviparus.

It is usually effective against inhibited larvae of Ostertagia species in cattle. Zerofen has an ovicidal effect on nematode eggs.

To ensure administration of the correct dose, bodyweight should be determined as accurately as possible; accuracy of the dosing device must be checked.

Give as an oral drench at the rate of 5 mg fenbendazole per kg bodyweight (1 ml per 5 kg bodyweight).

Give as an oral drench at the rate of 7.5 mg fenbendazole per kg bodyweight (3 ml per 10 kg bodyweight).

Animals must not be slaughtered for human consumption during treatment. Sheep may be slaughtered for human consumption only after 21 days from the last treatment. Cattle may be slaughtered for human consumption only after 14 days from the last treatment. Milk for human consumption must not be taken during treatment. Milk for human consumption may be taken from cows only after 132 hours from the last treatment. Do not use in sheep producing milk for human consumption.

Direct contact with skin should be kept to a minimum. Wear suitable protective clothing including impermeable rubber gloves. Wash hands after use.

DANGEROUS to aquatic life. Do not contaminate ponds, waterways or ditches with product or used containers. Dispose of any unused product or containers in accordance with guidance from your local waste regulation authority.

Shake container before use. Do not mix with other products.

Intensive use or misuse of anthelmintics can give rise to resistance. To reduce this risk dosing programmes should be discussed with your veterinary adviser.

For animal treatment only. Keep out of the sight and reach of children.

Do not freeze.

Standard packs – 1L, 2.5L, 5L, 10L

Flexi packs – 1L, 2.5L, 5L.

Fenbendazole belongs to the Benzimidazole (1-BZ) class of anthelmintics.

Zerofen 2.5% can be safely used at the recommended dose rate during pregnancy and lactation.