Synanthic Bovine Dewormer: Product Information

SYNANTHIC BOVINE DEWORMER- oxfendazole suspension
Boehringer Ingelheim Animal Health USA Inc.

Each mL contains 90.6 mg of oxfendazole.

The entire contents of the 1 liter bottle treats 88 cattle weighing approximately 500 lbs each.

The entire contents of the 4 liter bottle treats 352 cattle weighing approximately 500 lbs each.

Shake well before use.

Consult a veterinarian for assistance in the diagnosis, treatment and control of parasitism.

Residue Warnings:

Cattle must not be slaughtered until 7 days after treatment. Because a withdrawal time in milk has not been established, do not use in female dairy cattle of breeding age.


There are no contraindications for the use of Synanthic Bovine Dewormer Suspension, 9.06%, in cattle.

Keep this and all medications out of the reach of children. Not for human use.


Store at or below 25°C (77°F). Brief excursions are permitted up to 30°C (86°F). Do not freeze.


Synanthic Bovine Dewormer Suspension, 9.06%, is a broad-spectrum anthelmintic effective for removal and control of the following parasites in cattle: lungworms, roundworms (including inhibited forms of Ostertagia ostertagi ) and tapeworms, as indicated below:


Dictyocaulus viviparus (Adult, L4 )

Stomach Worms:

Barberpole Worms

Haemonchus contortus (Adult)

Haemonchus placei (Adult)

Small Stomach Worms

Trichostrongylus axei (Adult)

Brown Stomach Worms

Ostertagia ostertagi (Adult, L4 , inhibited L4 )

Intestinal Worms:

Nodular Worms

Oesophagostomum radiatum (Adult)


Bunostomum phlebotomum (Adult)

Small Intestinal Worms

Cooperia punctata (Adult, L4 )

Cooperia oncophora (Adult, L4 )

Cooperia surnabada (Adult, L4 )


Moniezia benedeni (Adult)

Dosage and Administration:

Synanthic Bovine Dewormer Suspension, 9.06%, is supplied in one liter and four liter packages containing 90.6 mg of oxfendazole per mL. The recommended dose for cattle is 2.05 mg/lb (4.5 mg/kg) of body weight. Synanthic Bovine Dewormer Suspension, 9.06%, should be administered orally by accurate dose syringe at the rate of 2.5 mL per 110 lb (50 kg) of body weight. This product should be shaken well immediately prior to use.


Determine the proper dose according to estimated body weight. Administer orally. The recommended dose of 2.05 mg/lb (4.5 mg/kg) is achieved when 2.5 mL of the suspension is given for each 110 lb (50 kg) of body weight.


Cattle Weight


Cattle Weight


110 lb

(50 kg)

2.5 mL

660 lb

(300 kg)

15.0 mL

220 lb

(100 kg)

5.0 mL

770 lb

(350 kg)

17.5 mL

330 lb

(150 kg)

7.5 mL

880 lb

(400 kg)

20.0 mL

440 lb

(200 kg)

10.0 mL

990 lb

(450 kg)

22.5 mL

550 lb

(250 kg)

12.5 mL

1100 lb

(500 kg)

25.0 mL

Treatment may be repeated in 4–6 weeks.

Restricted Drug (California) — Use Only as Directed

Synanthic is a registered trademark of Boehringer Ingelheim Vetmedica, Inc.

© 2013 Boehringer Ingelheim Vetmedica, Inc. All Rights Reserved.

Manufactured for:
Boehringer Ingelheim Vetmedica, Inc.
St. Joseph, MO 64506 U.S.A.

B2N2 84847720 383101-01

383102-01 80733739 80728522, R.1

Principal Display Panel – 1 L Front Label

NDC 0010-3831-01


oxfendazole oral suspension

Bovine Dewormer Suspension, 9.06%

For Animal Use Only

Net Contents: 1000 mL (1 liter)

NADA 140-854, Approved by FDA

Picture of 1 L front label
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Principal Display Panel – 1 Liter Back Label

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oxfendazole suspension
Product Information
Product Type OTC ANIMAL DRUG Item Code (Source) NDC:0010-3831
Route of Administration ORAL DEA Schedule
Active Ingredient/Active Moiety
Ingredient Name Basis of Strength Strength
# Item Code Package Description Multilevel Packaging
1 NDC:0010-3831-01 1000 mL in 1 BOTTLE, PLASTIC None
2 NDC:0010-3831-02 4000 mL in 1 BOTTLE, PLASTIC None
Marketing Information
Marketing Category Application Number or Monograph Citation Marketing Start Date Marketing End Date
NADA NADA140854 06/26/2020
Labeler — Boehringer Ingelheim Animal Health USA Inc. (007134091)

Revised: 06/2020 Boehringer Ingelheim Animal Health USA Inc. provides trustworthy package insert and label information about marketed drugs as submitted by manufacturers to the U.S. Food and Drug Administration. Package information is not reviewed or updated separately by Every individual animal healthcare product label entry contains a unique identifier which can be used to secure further details directly from the U.S. National Institutes of Health and/or the FDA.

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