💊Fenbendazole Dosage Calculator
Fenbendazole for Dogs
50 mg/kg body weight, once daily for 3 consecutive days. Standard deworming protocol for dogs of all sizes.
Fenbendazole for Cats
50 mg/kg body weight, once daily for 3-5 days. Same dosage as dogs, safe and effective for felines.
Fenbendazole Dosage Chart by Weight
| Weight | Dose (mg) | Granules 22.2% | Liquid 10% |
|---|---|---|---|
| 5 lbs (2.3 kg) | 115 mg | 0.52 grams | 1.1 ml |
| 10 lbs (4.5 kg) | 225 mg | 1.01 grams | 2.3 ml |
| 20 lbs (9.1 kg) | 455 mg | 2.05 grams | 4.5 ml |
| 30 lbs (13.6 kg) | 680 mg | 3.06 grams | 6.8 ml |
| 40 lbs (18.2 kg) | 910 mg | 4.10 grams | 9.1 ml |
| 50 lbs (22.7 kg) | 1135 mg | 5.11 grams | 11.3 ml |
| 60 lbs (27.3 kg) | 1365 mg | 6.15 grams | 13.7 ml |
| 80 lbs (36.4 kg) | 1820 mg | 8.20 grams | 18.2 ml |
| 100 lbs (45.5 kg) | 2275 mg | 10.25 grams | 22.8 ml |
* Based on standard 50 mg/kg dosing. Always verify with your veterinarian.
Frequently Asked Questions
What is the correct fenbendazole dosage for dogs?
The standard fenbendazole dosage for dogs is 50 mg per kg (22.7 mg per lb) of body weight, given once daily for 3 consecutive days. This treats common parasites including roundworms, hookworms, whipworms, and some tapeworms. Always consult your veterinarian for the correct dosage for your specific dog.
How do I calculate fenbendazole dosage by weight?
To calculate fenbendazole dosage by weight: multiply your pet's weight in kilograms by 50mg. For example, a 10kg (22lb) dog needs 500mg of fenbendazole per day. If using Panacur granules (22.2%), you would give approximately 2.25 grams. Our calculator above does this math automatically.
What is the fenbendazole dosage for cats?
Cats require the same dosage as dogs: 50 mg per kg of body weight, once daily. However, treatment duration may be 3-5 days depending on the parasite being treated. Fenbendazole is generally safe for cats but should be prescribed by a veterinarian.
How often should I deworm my dog or cat with fenbendazole?
For an active infection, a 3-day course (3-5 days for cats or Giardia) is standard. For routine prevention, many veterinarians recommend deworming every 3 months, though high-risk pets (hunting dogs, outdoor cats, multi-pet households) may need more frequent treatment. Puppies and kittens are usually dewormed on a schedule starting at 2-3 weeks of age. Follow the deworming schedule recommended by your veterinarian.
How much Panacur should I give my dog?
Panacur (fenbendazole) dosage depends on the product concentration. For Panacur C granules (22.2%): give 1 packet per 10 lbs of body weight. For Panacur liquid suspension (10%): give 1 ml per 2.2 lbs (1 kg). Our calculator above converts your dog's weight to the correct Panacur amount.
Is fenbendazole safe for puppies and kittens?
Fenbendazole is generally considered safe for puppies over 6 weeks old and kittens. It has a wide safety margin. However, very young or small animals require precise dosing. Always weigh your pet accurately and consult your veterinarian, especially for first-time treatment.
What is the difference between Safe-Guard and Panacur?
Safe-Guard and Panacur both contain the same active ingredient: fenbendazole. Safe-Guard is marketed by Merck for livestock and some pet products, while Panacur (by Intervet/Merck) is more commonly used for dogs and cats. The dosing is identical for the same concentrations.
How long does fenbendazole take to work?
Fenbendazole begins working immediately after administration, but you may not see dead worms in stool for 1-3 days. A full 3-day treatment course is needed to kill all parasites and their larvae. For Giardia, a 5-day course is typically recommended.
Can I give fenbendazole with food?
Yes, fenbendazole should be given with food for best absorption. Mixing the granules or liquid into a small amount of wet food, or giving it with a tasty treat your pet enjoys, can increase effectiveness and make dosing easier.
What parasites does fenbendazole treat?
Fenbendazole treats a wide range of parasites including: Roundworms (Toxocara, Toxascaris), Hookworms (Ancylostoma, Uncinaria), Whipworms (Trichuris), some Tapeworms (Taenia), Giardia, and Lungworms. It is not effective against all tapeworms or external parasites.
How much fenbendazole should I give my dog by weight?
The standard fenbendazole dose for dogs is 50 mg per kg of body weight. For example: a 5 lb (2.3 kg) dog needs 115 mg, a 20 lb (9 kg) dog needs 450 mg, a 50 lb (23 kg) dog needs 1,135 mg, and a 100 lb (45 kg) dog needs 2,275 mg daily for 3 consecutive days. Use our calculator above for precise dosing.
Is the fenbendazole dosage different for dogs and cats?
The per-weight dose is the same for both: 50 mg per kg of body weight, once daily. The main difference is treatment duration. Dogs are typically treated for 3 consecutive days, while cats are often treated for 3-5 days depending on the parasite. Because cats are usually smaller, the total milligrams per dose is lower, and mixing the dose into wet food helps ensure your cat takes the full amount.
Does fenbendazole treat lungworm in dogs and cats?
Yes. Fenbendazole is commonly used to treat lungworm infections (such as Aelurostrongylus in cats and certain lungworms in dogs). Lungworm treatment usually requires a longer course than a standard 3-day deworming, sometimes 1-3 weeks. Because lungworm can cause coughing and breathing problems, have your veterinarian confirm the diagnosis and the exact treatment length.
Can I give fenbendazole to a pregnant or nursing dog or cat?
Fenbendazole has a wide safety margin and is often used to deworm pregnant and nursing dogs to reduce parasite transmission to puppies. However, dosing and timing for pregnant or nursing animals should always be confirmed with your veterinarian, who can tailor the protocol to the parasite and the stage of pregnancy.
What is the Safe-Guard dosage for dogs?
Safe-Guard (fenbendazole) dosage for dogs is 50 mg per kg body weight, identical to Panacur. For Safe-Guard granules (22.2%): give approximately 1 gram per 5 kg (11 lbs) of body weight. For Safe-Guard liquid (10%): give 1 ml per kg (2.2 lbs). Administer once daily for 3 consecutive days.
What is the Panacur dosage for kittens?
Kittens follow the same weight-based Panacur dosage as adult cats: 50 mg per kg (22.7 mg per lb) of body weight, once daily for 3 consecutive days, usually starting around 2-3 weeks of age as part of a routine deworming schedule. Because kittens are small and gain weight quickly, weigh your kitten before each dose and use our calculator above to get the precise Panacur granule, liquid, or tablet amount. Always confirm the schedule with your veterinarian, especially for kittens under 6 weeks old.
Medical Disclaimer
This calculator is for informational purposes only and is not a substitute for professional veterinary advice. Fenbendazole is approved for veterinary use only and is not FDA-approved for human consumption. This tool covers animal deworming only. Always consult with a qualified veterinarian before administering any medication to your pet. The creators of this calculator assume no responsibility for decisions made based on this information.