MERCK Animal Health

Panacur® C

MERCK Animal Health

$15.50 - $32.83

Strength & Size

1 gram (Up to 10 lbs)

2 grams (10-20 lbs)

4 grams (30-40 lbs)

Packaging

3 Packets

Frequency Never forget to order with AutoShip 1st order:

Quantity

Description

Panacur C (fenbendazole)

Canine Dewormer

PANACUR C treats 4 major intestinal parasites in dogs. The daily dose for PANACUR C is 50 mg/kg (22.7 mg/lb) of body weight.
Mix the daily dose with a small amount of your dog’s usual food. Your dog should eat all of the medicated food. If feeding dry dog food, it may need to be moistened to aid mixing
Repeat the daily dose for 3 days in a row
Safe for all dogs 6 weeks and older, including pregnant dogs
Deworming schedules may vary depending on the climate where you live and the activity of your dog
Available in 3 sizes: three 1-gram packets – each packet treats 10 lbs; three 2-gram packets – each packet treats 20 lbs; and three 4-gram packets – each packet treats 40 lbs. Use a combination of packets to provide the recommended dose.

INDICATIONS:

For the treatment and control of Roundworms (Toxocara canis, Toxascaris leonina), Hookworms (Ancylostoma caninum, Uncinaria stenocephala), Whipworms (Trichuris vulpis), and Tapeworms (Taenia pisiformis).

IMPORTANT SAFETY INFORMATION:

For animal use only. Do not use in pups younger than 6 weeks. Do not deworm a dog or puppy that is sick. Approximately 1% of dogs had vomiting associated with the use of this product. Consult your veterinarian for help in the diagnosis, treatment and control of parasitism.

Link to Product Label

Product sourced directly from the manufacturer or their approved distributor. Guaranteed genuine product backed by the manufacturer.

For

Dogs

Ingredients

Active ingredients (in each dosage unit):

Fenbendazole granules 22.2% (222 mg/g)

Inactive ingredients:

Complete inactive ingredients list not provided by manufacturer.

Product class

Canine dewormer

Product flavoring

Panacur C is flavorless and odorless.

Product strength & size

Panacur C contains 222 mg of fenbendazole per gram of oral granules (22.2%) and is available in 3 sizes:

Three 1-gram packets - each packet treats 10 lbs.
Three 2-gram packets – each packet treats 20 lbs.
Three 4-gram packets – each packet treats 40 lbs.

Please ensure the selected product and quantity are appropriate for your pet, as recommended by your veterinarian. For current availability, please refer to the product selection above.

Usage

Panacur C should be administered as directed by your veterinarian. If you have questions about your pet’s prescribed dosing schedule (e.g., timing, interval), please contact your veterinarian.

Manufacturer Dosage and Administration*

The daily dose for Panacur C is 50 mg/kg (22.7 mg/lb) of body weight. Please refer to the following dosing table for help in finding the right dose for your dog.

Dosing Table
Dog Weight	Packet Size*
10 pounds	1 gram
20 pounds	2 gram
30 pounds	1 gram + 2 gram
40 pounds	4 gram
50 pounds	1 gram + 4 gram
60 pounds	2 gram + 4 gram
80 pounds	Two 4 gram
Over 80 pounds	Use combinations to obtain recommended daily dose.

*Packet size is the daily dose. The dog must be treated with this dose for 3 days in a row.

You should weigh your dog to make sure you are using the right size and number of packets. If your dog’s weight is in-between the suggested dosing sizes, it is safe to use the next higher size. For example, a 15-pound dog should be treated with the 2-gram packet.
Give Panacur C to your dog by mixing the daily dose with a small amount of the usual food. Make sure your dog eats all of the medicated food. You may need to moisten dry dog food to aid mixing.
Repeat the daily dose for three days in a row.

*Additional information may be provided within the manufacturer’s full Prescribing Information. Always follow the specific instructions provided by your veterinarian regarding your pet's care.

Storage

Store in a cool, dry place at a controlled room temperature (68-77°F). Keep this and all other medications in a secure location out of the reach of children and animals.

Exposure to extreme temperatures, light, or moisture can affect the integrity and effectiveness of medications. Always store this medication properly (e.g., away from the bathroom, kitchen sink, or other damp places), as outlined on the product label.

Side effects

Fenbendazole is generally well tolerated in dogs, and side effects are uncommon. The most common side effect of this medication is vomiting.

Contact your veterinarian immediately if any signs of an allergic reaction (e.g., facial or throat swelling, rash, difficulty breathing) occur.

The information provided above may not encompass all possible side effects. Please notify your veterinarian if your pet experiences any side effects, including those listed above, or if you notice anything unusual.

Precautions

Before using this product, please review the product label for any relevant warnings and safety precautions.

For oral use in dogs only.

Panacur C is safe for use in puppies 6 weeks or older and adult dogs, including those that are pregnant. Do not deworm a dog or puppy that is sick. Consult your veterinarian for diagnosis of the illness prior to administering Panacur C.

Do not administer this medication to animals with a known or suspected allergy/hypersensitivity to it or any of its ingredients. Allergic reactions to medications may occur. Please inform Vetsource and your veterinarian if your pet has any known sensitivities or allergies, especially to medications and supplements.

If your pet displays symptoms of an allergic reaction, discontinue therapy and call your veterinarian immediately or seek emergency veterinary attention. Symptoms may include (but are not limited to): swollen lips, tongue, face, or airways; difficulty breathing; agitation; profuse salivation; and widespread hives or itching.

Food and drug interactions

While there are no specific food or drug interactions reported for this product, potential interactions may still be possible. The following drugs* may have potential interactions with this medication: dexamethasone, methimazole, phenobarbital, and warfarin.

*NOTE: This may not be a comprehensive list. Please consult your veterinarian if you have any questions or concerns prior to use. Contact your veterinarian if your pet experiences any unusual reactions when multiple medications and/or supplements are given together.

Please ensure your veterinarian is aware of all medications, supplements, and over-the-counter (OTC) products that your pet is currently using. Your veterinarian may prescribe multiple medications, even if a potential drug interaction may occur. In these instances, your veterinarian may adjust the dosages or monitor your pet more closely.

Adverse reactions

If you are concerned that your pet has experienced an adverse reaction to this medication, please contact Merck Animal Health at 1-800-441-8272 or Vetsource Pet Owner Care at 877-738-4443.

Overdose

If you have any reason to suspect accidental ingestion or overdose, call your doctor/veterinarian or the appropriate poison control resource immediately.

For humans:

The national toll-free Poison Help line, 1-800-222-1222, will connect you to your local poison center in case of emergency. This service is available nationwide and in most U.S. territories.

For animals:

The ASPCA Animal Poison Control Center is available 24 hours a day, 365 days a year at 888-426-4435.

Pet Poison Helpline also provides a 24/7 animal poison control service at 855-764-7661.

*Please note: The contact information provided above is for third-party services in the event of a potential poison-related emergency. Consultation fees may apply for these services.

Disclaimer

The content provided on this page is NOT medical advice.

All content, including the images and product description above, is intended for general informational purposes only and should not be considered a substitute for professional veterinary consultation, diagnosis, or treatment.

For additional information about this product and how it fits into your pet's individual treatment plan, please consult your veterinarian.

Last revised: 7/22/2026

$15.50 - $32.83