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Generic name: oxfendazole liquid

NADA 140-854, Approved by FDA

For Animal Use Only

Each mL contains 90.6 mg of oxfendazole.

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

Lungworms: 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)
Hookworms Bunostomum phlebotomum (Adult)
Small Intestinal Worms Cooperia punctata (Adult, L4)
Cooperia oncophora (Adult, L4)
Cooperia surnabada (Adult, L4)
Tapeworms 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 Dose Cattle Weight Dose
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.

© 2010 Boehringer Ingelheim Vetmedica, Inc. All Rights Reserved.

Manufactured by:

Boehringer Ingelheim Vetmedica, Inc.

St. Joseph, MO 64506 U.S.A.

Liter - Front Label

Liter - Back Label

Liter - Front Label

Liter - Back label

oxfendazole liquid
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
1 NDC:0010-3831-01 1000 mL in 1 BOTTLE, PLASTIC
2 NDC:0010-3831-02 4000 mL in 1 BOTTLE, PLASTIC
Marketing Information
Marketing Category Application Number or Monograph Citation Marketing Start Date Marketing End Date
NADA NADA140854 09/17/1990
Labeler - Boehringer Ingelheim Vetmedica, Inc. (007134091)
Boehringer Ingelheim Vetmedica, Inc.