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Date: Thursday, June 13, 2024 16:42

Release 2.84
Zerofen Worm Drench 2.5% Oral Suspension
 
Species: Sheep, Cattle
Therapeutic indication: Pharmaceuticals: Endoparasiticides: Anthelmintics for cattle, Anthelmintics for sheep, Tapeworm products
Active ingredient: Fenbendazole
Product:Zerofen Worm Drench 2.5% Oral Suspension
Product index: Zerofen Worm Drench 2.5% Oral Suspension
Cattle - milk: 132 hours
Cattle - meat: 14 days
Sheep - meat: 21 days
Withdrawal notes: Not for use in sheep producing milk for human consumption
Incorporating:
Presentation
A pale pink smooth suspension for oral administration. Each ml of Zerofen 2.5% contains 25 mg fenbendazole.
Uses
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.
Dosage and administration
To ensure administration of the correct dose, bodyweight should be determined as accurately as possible; accuracy of the dosing device must be checked.
Sheep
Give as an oral drench at the rate of 5 mg fenbendazole per kg bodyweight (1 ml per 5 kg bodyweight).
Bodyweight
Dose
Up to 15 kg
 3 ml
16–25 kg
 5 ml
26–35 kg
 7 ml
36–50 kg
10 ml
51–65 kg
13 ml
66–75 kg
15 ml
Over 75 kg give 2 ml per 10 kg.
Cattle
Give as an oral drench at the rate of 7.5 mg fenbendazole per kg bodyweight (3 ml per 10 kg bodyweight).
Bodyweight
Dose
 50 kg
 15 ml
100 kg
 30 ml
150 kg
 45 ml
200 kg
 60 ml
250 kg
 75 ml
300 kg
 90 ml
350 kg
105 ml
Over 350 kg give 15 ml per 50 kg.
Contra-indications, warnings, etc
Withdrawal periods
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.
Special warnings
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.
Pharmaceutical precautions
Do not freeze.
Legal category
Legal category: POM-VPS
Packaging quantities
Standard packs – 1L, 2.5L, 5L, 10L
Flexi packs – 1L, 2.5L, 5L.
Further information
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.
Marketing Authorisation Number
Vm 11990/4000.
Significant changes