panacur

Manufacturer
Merck Sharp & Dohme Corp. | Intervet Production S.A. | Zhejiang Apeloa Kangyu Pharmaceutical Co., Ltd
Effective date
2026-06-17
Label type
PRESCRIPTION ANIMAL DRUG LABEL
Version
7
Source
monthly-update
Hydrated at
2026-07-17 21:33:59

Label at a glance#

ProductPanacur
Active ingredientFenbendazole
Label structure7 sections

Dosage and administration

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. EXAMPLES: 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 150...

Storage and handling

Shake well before use. Store at or below 25°C (77°F) Protect from freezing.

Label contents#

Full prescribing information#

INDICATIONS AND DOSAGE:

VETERINARY INDICATIONS SECTION

SPL UNCLASSIFIED SECTION

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).

SPL UNCLASSIFIED SECTION

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).

SPL UNCLASSIFIED SECTION

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.

STORAGE AND HANDLING SECTION

Shake well before use.

Store at or below 25°C (77°F)

Protect from freezing.

DIRECTIONS:

DOSAGE & ADMINISTRATION SECTION

Horses and Beef and Dairy Cattle:

SPL UNCLASSIFIED SECTION

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.

EXAMPLES:

Animal WeightDose
(5 mg/kg)
Dose
(10 mg/kg)
100 lb2.3 mL4.6 mL
200 lb4.6 mL9.2 mL
300 lb6.9 mL13.8 mL
400 lb9.2 mL18.4 mL
500 lb11.5 mL23.0 mL
1000 lb23.0 mL46.0 mL
1500 lb34.5 mL69.0 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.

WARNINGS SECTION

WARNINGS: 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, www.fda.gov/reportanimalae.

WARNINGS SECTION

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.

SPL UNCLASSIFIED SECTION

Fenbendazole (active ingred.) made in: see imprint.
Formulated in France.
Distributed by:
Intervet Inc. (d/b/a Merck Animal Health)
Rahway, NJ 07065
Approved by FDA under NADA # 104-494
Approved by FDA under NADA # 128-620
©2025 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.
Rev. 08/2025

API
Made in:

LOT
NUMBER:

EXPIRATION
DATE:

240729 R2

PRINCIPAL DISPLAY PANEL - 1,000 mL Bottle Label

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

panacur®
(fenbendazole)

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.

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

1,000 mL (33.8 fl oz)

MERCK
Animal Health

249644 R1

PRINCIPAL DISPLAY PANEL - 1,000 mL Bottle LabelPRINCIPAL DISPLAY PANEL - 1,000 mL Bottle Label

Product Linked Resources#

Resource, Code type, Value table
ResourceCode typeValueEquivalent identifiersSource image
Data codeData Matrix249644panacur-01.jpg

DailyMed Socrata Ingredients#

Ingredient, Type, UNII table
IngredientTypeUNIISPL versionUploaded
FenbendazoleACTIVE INGREDIENT621BVT9M361
FenbendazoleACTIVE MOIETY621BVT9M361
carboxymethylcellulose sodiumINACTIVE INGREDIENTK679OBS3111
citric acid monohydrateINACTIVE INGREDIENT2968PHW8QP1
methylparabenINACTIVE INGREDIENTA2I8C7HI9T1
povidoneINACTIVE INGREDIENTFZ989GH94E1
propylparabenINACTIVE INGREDIENTZ8IX2SC1OH1
silicon dioxideINACTIVE INGREDIENTETJ7Z6XBU41
trisodium citrate dihydrateINACTIVE INGREDIENTB22547B95K1
waterINACTIVE INGREDIENT059QF0KO0R1

Products#

Every source-derived product name is available through these pages.

DailyMed product names page 1 of 1 · 10 matching rows.

NDC Codes#

Product NDC, Package NDC table
Product NDCPackage NDC
57926-08757926-087-01

Ingredients#

Every source-derived ingredient row is available through these pages.

DailyMed ingredient rows page 1 of 1 · 9 matching rows.

Source Document#

Source XML

Older Hydrated Versions#

Version, Effective date, Source table
VersionEffective dateSourceHydrated
62024-11-15full-release2026-06-01 02:45:27

Inactive ingredient matches#

Inactive Ingredient Database values describe FDA-listed use contexts. The match method and ambiguity count are shown because ingredient names, routes, and dosage forms are not always unique. Browse recovered IID releases and source provenance.

Inactive ingredient links page 1 of 7 · 405 matching rows.

DailyMed ingredient, IID ingredient, UNII table
DailyMed ingredientIID ingredientUNIIDosage form / routePotencyMaximum daily exposureMatch
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPLOTION / TOPICAL0.85 %w/wExact identifier — unii candidate
88 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TSOLUTION / RECTAL0.13 %w/vExact identifier — unii candidate
79 equally ranked IID candidates
povidonePOVIDONEFZ989GH94ETABLET, DELAYED RELEASE / ORAL53 mgExact identifier — unii candidate
30 equally ranked IID candidates
carboxymethylcellulose sodiumCARBOXYMETHYLCELLULOSE SODIUMK679OBS311FILM, SOLUBLE / BUCCAL47 mgExact identifier — unii candidate
44 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHINJECTION / PARENTERAL2 mgExact identifier — unii candidate
68 equally ranked IID candidates
silicon dioxideSILICON DIOXIDEETJ7Z6XBU4PASTE / DENTAL34 %w/wExact identifier — unii candidate
49 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TINJECTION / SOFT TISSUE0.15 %w/vExact identifier — unii candidate
79 equally ranked IID candidates
silicon dioxideSILICON DIOXIDEETJ7Z6XBU4CAPSULE, COATED PELLETS / ORAL69 mgExact identifier — unii candidate
49 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KCAPSULE / ORAL35 mgExact identifier — unii candidate
47 equally ranked IID candidates
carboxymethylcellulose sodiumCARBOXYMETHYLCELLULOSE SODIUMK679OBS311PASTE, DENTIFRICE / DENTAL1.2 %w/wExact identifier — unii candidate
44 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TINJECTION / PARENTERAL18 mgExact identifier — unii candidate
79 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TPOWDER / ORALNAExact identifier — unii candidate
79 equally ranked IID candidates
silicon dioxideSILICON DIOXIDEETJ7Z6XBU4GRANULE, FOR SUSPENSION, EXTENDED RELEASE / ORALNAExact identifier — unii candidate
49 equally ranked IID candidates
povidonePOVIDONEFZ989GH94ETABLET, EXTENDED RELEASE / ORAL101 mgExact identifier — unii candidate
30 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TCREAM / TOPICAL3000 mgExact identifier — unii candidate
79 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPINJECTION / INTRACARDIAC1.05 %w/vExact identifier — unii candidate
88 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPTABLET, ORALLY DISINTEGRATING, DELAYED RELEASE / ORAL2 mgExact identifier — unii candidate
88 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KTABLET, DELAYED RELEASE / ORAL640 mgExact identifier — unii candidate
47 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPGRANULE, FOR SUSPENSION / ORAL113 mgExact identifier — unii candidate
88 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TSUPPOSITORY / VAGINALNAExact identifier — unii candidate
79 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TSUSPENSION/ DROPS / OPHTHALMIC0.05 %w/wExact identifier — unii candidate
79 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHSUSPENSION / ORAL64 mgExact identifier — unii candidate
68 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHSOLUTION / RECTAL0.02 %w/vExact identifier — unii candidate
68 equally ranked IID candidates
povidonePOVIDONEFZ989GH94ETROCHE / ORAL30 mgExact identifier — unii candidate
30 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KTABLET / SUBLINGUAL51 mgExact identifier — unii candidate
47 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TLOTION / TOPICAL351 mgExact identifier — unii candidate
79 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TSOLUTION / TOPICAL216 mgExact identifier — unii candidate
79 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPEMULSION / TOPICAL0.11 %w/wExact identifier — unii candidate
88 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TSOLUTION / RESPIRATORY (INHALATION)0.03 %w/wExact identifier — unii candidate
79 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHINJECTION, SOLUTION / INTRAVENOUS5 mgExact identifier — unii candidate
68 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KINJECTION, POWDER, LYOPHILIZED, FOR SOLUTION / INTRAVENOUS800 mgExact identifier — unii candidate
47 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHSOLUTION/ DROPS / OPHTHALMIC0.01 %w/vExact identifier — unii candidate
68 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHGEL / TOPICAL4 mgExact identifier — unii candidate
68 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPSUSPENSION, EXTENDED RELEASE / ORAL140.8 mgExact identifier — unii candidate
88 equally ranked IID candidates
povidonePOVIDONEFZ989GH94EGRANULE, FOR SUSPENSION, EXTENDED RELEASE / ORAL350 mgExact identifier — unii candidate
30 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHLIQUID / ORAL2 mgExact identifier — unii candidate
68 equally ranked IID candidates
silicon dioxideSILICON DIOXIDEETJ7Z6XBU4TABLET, FILM COATED / ORAL166 mgExact identifier — unii candidate
49 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHINJECTION, SOLUTION / INTRAMUSCULAR5 mgExact identifier — unii candidate
68 equally ranked IID candidates
povidonePOVIDONEFZ989GH94ETABLET / SUBLINGUAL6 mgExact identifier — unii candidate
30 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHCREAM / TOPICAL6 mgExact identifier — unii candidate
68 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPSOLUTION / OPHTHALMIC0.03 %w/vExact identifier — unii candidate
88 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KPOWDER, FOR SUSPENSION / ORAL5010 mgExact identifier — unii candidate
47 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TSUSPENSION, EXTENDED RELEASE / ORAL40 mgExact identifier — unii candidate
79 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TSHAMPOO, SUSPENSION / TOPICAL0.15 %w/wExact identifier — unii candidate
79 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KINJECTION, SUSPENSION / INTRAVITREAL0.17 %w/vExact identifier — unii candidate
47 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KSPRAY, METERED / NASAL1 mgExact identifier — unii candidate
47 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPDOUCHE / VAGINAL0.07 %w/wExact identifier — unii candidate
88 equally ranked IID candidates
silicon dioxideSILICON DIOXIDEETJ7Z6XBU4FILM, SOLUBLE / ORAL2 mgExact identifier — unii candidate
49 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TINJECTION, SUSPENSION / INTRAMUSCULAR1 mgExact identifier — unii candidate
79 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHSUSPENSION / RECTAL271 mgExact identifier — unii candidate
68 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TPASTE, DENTIFRICE / DENTAL0.05 %w/wExact identifier — unii candidate
79 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KGRANULE, FOR SUSPENSION / ORAL4950 mgExact identifier — unii candidate
47 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPINJECTION, SOLUTION / INTRAMUSCULAR26 mgExact identifier — unii candidate
88 equally ranked IID candidates
trisodium citrate dihydrateTRISODIUM CITRATE DIHYDRATEB22547B95KSOLUTION / RECTAL773 mgExact identifier — unii candidate
47 equally ranked IID candidates
carboxymethylcellulose sodiumCARBOXYMETHYLCELLULOSE SODIUMK679OBS311CAPSULE / ORAL160 mgExact identifier — unii candidate
44 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TJELLY / NASAL250 mgExact identifier — unii candidate
79 equally ranked IID candidates
carboxymethylcellulose sodiumCARBOXYMETHYLCELLULOSE SODIUMK679OBS311SUSPENSION / ORAL1080 mgExact identifier — unii candidate
44 equally ranked IID candidates
propylparabenPROPYLPARABENZ8IX2SC1OHCREAM, AUGMENTED / TOPICAL2 mgExact identifier — unii candidate
68 equally ranked IID candidates
methylparabenMETHYLPARABENA2I8C7HI9TCAPSULE / ORAL7 mgExact identifier — unii candidate
79 equally ranked IID candidates
citric acid monohydrateCITRIC ACID MONOHYDRATE2968PHW8QPPOWDER, FOR SUSPENSION / ORAL840 mgExact identifier — unii candidate
88 equally ranked IID candidates

Reported adverse events (FAERS/openFDA)#

Adverse event summaries are temporarily unavailable. Other product information remains available.