Description

Fenbendazole 10% Liquid Solution (100 mg/mL)

Fenbendazole 10% Oral Suspension is a benzimidazole-class anthelmintic used for the treatment and control of susceptible gastrointestinal parasites and certain lungworms in multiple animal species. It works by binding to parasite tubulin, disrupting energy metabolism, and leading to parasite elimination.

Fenbendazole is the active ingredient found in widely used veterinary products such as Panacur and Safe-Guard.

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What Parasites Does It Target?

Fenbendazole is used for the treatment of susceptible:

• Roundworms (Ascarids)
• Hookworms
• Whipworms
• Certain tapeworms (Taenia species; not effective against Dipylidium caninum)
• Lungworms
• Strongyles (in horses and ruminants)
• Threadworms
• Certain protozoal infections, such as Giardia (off-label in small animals)

Parasite susceptibility varies by species and region.

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Symptoms of Parasitic Infestation

Animals with internal parasites may show:

• Weight loss or poor growth
• Diarrhea or soft stools
• Pot-bellied appearance (young animals)
• Dull coat or poor body condition
• Anemia (pale gums)
• Coughing (lungworm)
• Reduced feed efficiency in livestock

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Species-Specific Dosage (Cross-Verified by mg/kg Standards)

Active Strength:
10% solution = 100 mg per mL

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Dogs

Standard Dose: 50 mg/kg
= 22.7 mg/lb

Since the product is 100 mg/mL:

22.7 ÷ 100 = 0.23 mL per lb

Administration:
Give 0.23 mL per lb once daily for 3 consecutive days

Giardia Protocol:
50 mg/kg once daily for 3–5 days (veterinary guidance recommended)

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Cats

Most veterinary references use:

50 mg/kg once daily for 3–5 days

= 0.23 mL per lb

Note: Use in cats is extra-label in some regions and should follow veterinary guidance.

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Horses

5 mg/kg single dose for strongyles
= 2.27 mg/lb

2.27 ÷ 100 = 0.023 mL per lb (single dose)

For encysted small strongyles:
10 mg/kg daily for 5 days (veterinary-directed program)

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Cattle

Label-standard dose:

5 mg/kg single dose
= 2.27 mg/lb

2.27 ÷ 100 = 0.023 mL per lb (single oral dose)

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Goats & Sheep

Commonly used dose:

5–10 mg/kg depending on parasite risk

5 mg/kg = 0.023 mL per lb
10 mg/kg = 0.045 mL per lb

Veterinary consultation recommended due to resistance concerns.

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Swine (Pigs)

5 mg/kg
= 0.023 mL per lb

Duration may vary depending on the management program.

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Rabbits

Used for Encephalitozoon cuniculi:

20 mg/kg once daily for 28 days
= 9.1 mg/lb
= 0.09 mL per lb

Must be done under veterinary supervision.

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Birds & Reptiles

Dosing varies significantly by species and metabolism.
Only use under experienced exotic-animal veterinary supervision.

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Treatment Duration Summary

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Key Benefits

• Broad-spectrum gastrointestinal control
• High safety margin when properly dosed
• Approved for use in multiple livestock species
• Used in puppies as young as 2 weeks (per labeled products like Panacur C)
• Can be administered directly or mixed with feed

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Safety & Precautions

• Always do it by accurate body weight.
• Follow the meat and milk withdrawal times for food-producing animals.
• Avoid underdosing to prevent parasite resistance.
• Consult a veterinarian before use in pregnant animals (generally considered safe in most species at label dose, but species-specific guidance matters).

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Withdrawal Periods (Important for Livestock)

Withdrawal times vary by species and formulation. Always follow label-specific withdrawal times for:

• Meat animals
• Dairy cattle
• Breeding stock

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FAQs

How quickly does Fenbendazole start working?

Parasite metabolism disruption begins shortly after dosing. Clinical improvement depends on parasite burden and species.

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Can I mix it with feed or water?

Yes, but ensure the full calculated dose is consumed.

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Is it effective against Giardia?

Yes, commonly used in dogs and cats for Giardia at 50 mg/kg for 3–5 days (veterinary-guided use).

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Can I use one bottle for multiple species?

Yes, if proper species-specific dosing is strictly followed.

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Is it safe for pregnant animals?

Generally considered safe in many species at the label dose, but veterinary guidance is recommended.

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Storage

• Store at controlled room temperature
• Protect from direct sunlight
• Do not freeze

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Research & Regulatory References

Dosage standards and parasite indications align with veterinary labeling and guidance associated with:

• U.S. Food and Drug Administration (approved livestock uses)
• American Veterinary Medical Association clinical guidance
• Labeling data from Panacur
• Labeling data from Safe-Guard