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Synanthic® Cattle Dewormer 22.5% - 500cc

Boehringer Ingelheim , 004054
QC Supply Part #: 540697
Shipping: Pharmaceutical Flat-Rate Shipping
Availability: In Stock

Broad-spectrum dewormer for the removal and control of certain parasites in cattle. Drenching Gun not included (#540699, sold separately).


Each mL of Synanthic® Cattle Dewormer 22.5% - 500cc contains 225 mg. of oxfendazole. Synanthic® Cattle 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 mcmasteri (Adult, L4)
Tapeworms Moniezia benedeni (Adult)

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

Administration and Dosage: The recommended dose for cattle is 2.05mg/lb (4.5mg/kg) of bodyweight. Synanthic® Cattle Dewormer Suspension 22.5%, should be administered orally by accurate dose syringe at the rate of 1mL per 110lb (50kg) of bodyweight. This product should be shaken well immediately prior to use.

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

ResidueWarnings: 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.

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

Directions: Determine the proper dose according to estimated bodyweight. Administer orally. The recommended dose of 2.05mg/lb (4.5mg/kg) is achieved when 1mL of the suspension is given for each 110lb (50kg) of bodyweight.


Cattle WeightDose
110lb (50kg) 1.0mL
220lb (100kg) 2.0mL
330lb (150kg) 3.0mL
440lb (200kg) 4.0mL
550lb (250kg) 5.0mL
660lb (300kg) 6.0mL
770lb (350kg) 7.0mL
880lb (400kg) 8.0mL
990lb (450kg) 9.0mL
1100lb (500kg) 10.0mL

Treatment may be repeated in 4–6 weeks.

Available in 2 Sizes:

  • #540697 — 500cc
  • #540698 — 1 Liter
Manufacturer Part Number 004054
Animal Cattle



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