With a highly concentrated dose of 1 mL per 110 pounds, SYNANTHIC delivers effective, broad-spectrum protection with less than half the volume of Safe-Guard® (fenbendazole) and less than one-quarter the volume of Valbazen® (albendazole).
SYNANTHIC® (oxfendazole oral suspension)
Deworming power meets precision with a low-dose drench of 1 mL per 110 pounds.
Available in 500-mL, 1-Liter and 4-Liter sizes.
Details
SYNANTHIC drench dewormer packs broad-spectrum, fast-acting power into each highly concentrated dose, reaching peak potency within 20 hours.*1 That means every mL – and every dollar – goes further for your herd.
Features & Benefits
SYNANTHIC® (oxfendazole oral suspension) Dewormer controls and removes the parasites below.
SYNANTHIC® (oxfendazole oral suspension) is highly effective, controlling over a dozen of the most economically devastating internal parasites.2
SYNANTHIC white dewormer controls and removes all of the parasites shown in the chart below, as well as barber’s pole worms: Haemonchus contortus (Adult), Haemonchus placei (Adult); small stomach worms: Trichostrongylus axei (Adult); nodular worms: Oesophagostomum radiatum (Adult); hookworms: Bunostomum phlebotomum (Adult); and lungworms: Dictyocaulus viviparus (Adult, L4).
Dosage & Administration
Resources
Product Inserts & Labels
Other Resources
Safety
SYNANTHIC RESIDUE WARNINGS:
Cattle must not be slaughtered until seven days after treatment. Because a withdrawal time in milk has not been established, do not use in female dairy cattle of breeding age.
Sustainable Deworming
Diagnostics
Monitor deworming efficacy with ongoing surveillance and routine diagnostic testing.
Combination Treatment
Using two or more dewormers from different drug classes with different modes of action to reduce the amount of parasite survivors.
Refugia
Portion of the parasite population not exposed to selection pressure. Parasites are left in "refuge" from the dewormer. Consult with your veterinarian.
Management
Forage height, pasture management, stocking density, overgrazing and rotation impact deworming programs.
References
* Clinical relevance has not been determined.
1 Prichard RK, Hennessy DR, Steel JW, Lacey E. Metabolite concentrations in plasma following treatment of cattle with five anthelmintics. Res Vet Sci 1985;39(2):173–178.
2 SYNANTHIC product label.
Trademarks
SYNANTHIC® and the Cattle Head logo® are registered trademarks of Boehringer Ingelheim Animal Health USA Inc. All other trademarks are the property of their respective owner. ©2025 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All rights reserved.
US-RUM-0086-2025