Fenbendazole
AntiparasiticsA benzimidazole anthelmintic. It binds to the parasite's β-tubulin, preventing microtubule formation, which disrupts nutrient uptake within the worm's cells and leads to its slow death. It is broad-spectrum and covers some larval stages.
Drug class
Antiparasitics
Registered species
3
Recorded effects
0
Related products
4
Pharmacological information
A class-level scientific overview for general reference — no doses. The ultimate reference is always the locally approved product leaflet and consultation with a veterinarian.
Mechanism of action
A benzimidazole anthelmintic. It binds to the parasite's β-tubulin, preventing microtubule formation, which disrupts nutrient uptake within the worm's cells and leads to its slow death. It is broad-spectrum and covers some larval stages.
Indications
- Gastrointestinal and lung roundworms
- Some susceptible tapeworms
Contraindications & warnings
- A relatively wide safety margin, with adherence to withdrawal periods in food animals
- Caution in early pregnancy in some species per the label
Drug interactions
- No major documented drug interactions at the class level
Withdrawal periods
Note: Source: UK Veterinary Medicines Directorate (VMD). The figures are a guidance reference that may differ from the product registered in your country — always verify the locally approved leaflet and consult a veterinarian before slaughter or consuming products.
Panacur AquaSol 200 mg/ml Oral Suspension for Use in Drinking Water for Pigs and Chicken
Oral suspension · MSD Animal Health UK Limited
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Chickens | 6 days | — | zero |
Zerofen Worm Drench 10% w/v Oral Suspension for Sheep and Cattle
Oral suspension · Chanelle Pharmaceuticals Manufacturing Ltd
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Cattle | 14 days | 132 hours | — |
| Sheep | 21 days | — | — |
Zerofen Worm Drench 2.5% w/v Oral Suspension for Sheep and Cattle
Oral suspension · Chanelle Pharmaceuticals Manufacturing Ltd
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Cattle | 14 days | 132 hours | — |
| Sheep | 21 days | — | — |
Gallifen 200 mg/ml Suspension for Use in Drinking Water for Chickens and Pheasants
Suspension for use in drinking water · Huvepharma N.V.
| Species | Meat | Milk | Eggs |
|---|---|---|---|
| Chickens | 8 days | — | zero |
Recorded adverse effects
openFDA veterinary reports — the numbers are report counts, not a severity rate.
No adverse-effect data recorded for this ingredient yet.
Related products
Panacur AquaSol 200 mg/ml Oral Suspension for Use in Drinking Water for Pigs and Chicken
Oral suspension · MSD Animal Health UK Limited
Zerofen Worm Drench 10% w/v Oral Suspension for Sheep and Cattle
Oral suspension · Chanelle Pharmaceuticals Manufacturing Ltd
Zerofen Worm Drench 2.5% w/v Oral Suspension for Sheep and Cattle
Oral suspension · Chanelle Pharmaceuticals Manufacturing Ltd
Gallifen 200 mg/ml Suspension for Use in Drinking Water for Chickens and Pheasants
Suspension for use in drinking water · Huvepharma N.V.
Sources
- •Withdrawal periods: UK Veterinary Medicines Directorate (VMD).
- •European Medicines Agency (EMA) — Veterinary medicines
- •Merck Veterinary Manual — Pharmacology
- •Always verify the locally approved leaflet and consult a veterinarian.