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SYNANTHIC 22.5% 500 ML
Item 736672
Retail Unit Each
Mfg Name
Mfg Item ID 383211000
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Synathic® 22.5% - Give orally at the rate of 1 mL per 110 lbs of body weight.


Boehringer Ingelheim


For Animal Use Only

NADA 140-854, Approved by FDA

Each mL contains 225 mg of oxfendazole.

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

Indications: Synanthic Bovine Dewormer Suspension, 22.5%, is a broad-spectrum anthelmintic effective for the 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, 22.5%, is supplied in 500 mL and one liter packages containing 225 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, 22.5%, should be administered orally by accurate dose syringe at the rate of 1 mL per 110 lb (50 kg) of body weight. This product should be shaken well immediately prior to use.

Directions: 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 1 mL of the suspension is given for each 110 lb (50 kg) of body weight.


Cattle Weight


110 lb (50 kg)

1.0 mL

220 lb (100 kg)

2.0 mL

330 lb (150 kg)

3.0 mL

440 lb (200 kg)

4.0 mL

550 lb (250 kg)

5.0 mL

660 lb (300 kg)

6.0 mL

770 lb (350 kg)

7.0 mL

880 lb (400 kg)

8.0 mL

990 lb (450 kg)

9.0 mL

1100 lb (500 kg)

10.0 mL

Treatment may be repeated in 4-6 weeks.

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.

Caution: Use only as directed. Keep out of reach of children. Not for human use.

Safety: There are no contraindications for the use of Synanthic Bovine Dewormer Suspension, 22.5%, in cattle.

Shake well before use.

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

Restricted Drug (California) - Use Only as Directed.

© 2012 Boehringer Ingelheim Vetmedica, Inc. All Rights Reserved.

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

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

Net Contents:



500 mL - The entire contents treats 110 cattle weighing approximately 500 lbs each.



80731256, R.0


1000 mL (1 liter) - The entire contents treats 220 cattle weighing approximately 500 lbs each.



80731264, R.0


NAC No.: 1028221.1