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Panacur Horse Dewormer Suspension 10%

This page contains information on Panacur Horse Dewormer Suspension 10% for veterinary use.
The information provided typically includes the following:
  • Panacur Horse Dewormer Suspension 10% Indications
  • Warnings and cautions for Panacur Horse Dewormer Suspension 10%
  • Direction and dosage information for Panacur Horse Dewormer Suspension 10%

Panacur Horse Dewormer Suspension 10%

This treatment applies to the following species:
Company: Intervet/Merck Animal Health


Horse & Cattle Dewormer

Suspension 10% (100 mg/mL)

Withdrawal Periods and Residue Warnings: Milk taken from cows during treatment and for 48 hours after the last treatment must not be used for human consumption. Cattle must not be slaughtered for human consumption within 8 days following last treatment with this drug product. Not for use in beef calves less than 2 months of age, dairy calves, and veal calves. A withdrawal period has not been established for this product in pre-ruminating calves.

Panacur Horse Dewormer Suspension 10% Caution

Federal law restricts this drug to use by or on the order of a licensed veterinarian.


Horses -2.3 mg/lb (5 mg/kg): for the treatment and control of large strongyles (Strongylus edentatus, S. equinus, S. vulgaris, Triodontophorus spp.), small strongyles (Cyathostomum spp., Cylicocyclus spp., Cylicostephanus spp., Cylicodontophorus spp.), and pinworms (Oxyuris equi). 4.6 mg/lb (10 mg/kg): for the treatment and control of ascarids (Parascaris equorum).

Beef and Dairy Cattle - 2.3 mg/lb (5 mg/kg): for the treatment and control of: Lungworms: Adult Dictyocaulus viviparus; Stomach worms: Adult brown stomach worms (Ostertagia ostertagi), Adult and fourth stage larvae barberpole worms (Haemonchus contortus & H. placei), and Adult and fourth stage larvae small stomach worms (Trichostrongylus axei); Intestinal worms (Adult and fourth stage larvae): hookworms (Bunostomum phlebotomum), thread-necked intestinal worms (Nematodirus helvetianus), small intestinal worms (Cooperia punctata & C. oncophora), bankrupt worms (Trichostrongylus colubriformis), and nodular worms (Oesophagostomum radiatum).

Beef Cattle Only - 4.6 mg/lb (10 mg/kg): for the treatment and control of: Stomach worms (4th stage inhibited larvae): Ostertagia ostertagi (Type II Ostertagiasis); Tapeworms: Moniezia benedeni.

Do not use in dairy cattle at 10 mg/kg.

Shake well before use.

Store at or below 25° C (77° F)

Protect from freezing.

Directions For Use

Horses and Beef and Dairy Cattle:

Administer orally by suitable dosing syringe. Insert nozzle of syringe through the interdental space and deposit the drug on the back of the tongue by depressing the plunger. The drug may also be administered by stomach tube.


Animal Weight

Dose (5 mg/kg)

Dose (10 mg/kg)

100 lb

2.3 mL

4.6 mL

200 lb

4.6 mL

9.2 mL

300 lb

6.9 mL

13.8 mL

400 lb

9.2 mL

18.4 mL

500 lb

11.5 mL

23.0 mL

1000 lb

23.0 mL

46.0 mL

1500 lb

34.5 mL

69.0 mL

Do not underdose. Ensure each animal receives a complete dose based on a current body weight. Underdosing may result in ineffective treatment, and encourage the development of parasite resistance.


NOT FOR USE IN HUMANS. KEEP OUT OF REACH OF CHILDREN. The Safety Data Sheet (SDS) contains more detailed occupational safety information. For customer service, adverse effects reporting, and/or a copy of the SDS, call 1-800-211-3573. For additional information about adverse drug experience reporting for animal drugs, contact FDA at 1-888-FDAVETS,

OTHER WARNINGS: Do not use in horses intended for human consumption.

Parasite resistance may develop to any dewormer, and has been reported for most classes of dewormers. Treatment with a dewormer used in conjunction with parasite management practices appropriate to the geographic area and the animal(s) to be treated may slow the development of parasite resistance. Fecal examinations or other diagnostic tests and parasite management history should be used to determine if the product is appropriate for the herd, prior to the use of any dewormer. Following the use of any dewormer, effectiveness of treatment should be

monitored (for example, with the use of a fecal egg count reduction test or another appropriate

method). A decrease in a drug’s effectiveness over time as calculated by fecal egg count reduction tests may indicate the development of resistance to the dewormer administered. Your parasite management plan should be adjusted accordingly based on regular monitoring.

Fenbendazole (active ingred.) made in: see imprint. Formulated in France.

Distributed by:

Intervet Inc. (d/b/a Merck Animal Health), Madison, NJ 07940

Approved by FDA under NADA # 104-494

Approved by FDA under NADA # 128-620

©2022 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.

Rev. 03/22

1,000 mL (33.8 fl.oz.)

328771 R8

385504 R2

CPN: 1047343.4

Intervet Inc.

Customer Service:   800-521-5767
Order Desk:   800-648-2118
Technical Service (Companion Animal):   800-224-5318
Technical Service (Livestock):   800-211-3573
Fax:   973-937-5557
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Copyright © 2023 Animalytix LLC. Updated: 2023-11-27