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Cat. No. M3245
Fenbendazole Structure
Size Price Availability Quantity
100mg USD 40  USD40 In stock
500mg USD 80  USD80 In stock
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Quality Control & Documentation
Biological Activity

Fenbendazole (Panacur) is a broad spectrum benzimidazole anthelmintic used against gastrointestinal parasites with an IC5 of about 0.01 ug/ml. Drug interactions may occur if using bromsalan flukicides such as dibromsalan and tribromsalan. Abortions in cattle and death in sheep have been reported after using these medications together. In a study, the LC90s of albendazole and mebendazole were 0.92 to 2.1ug/ml, and those of fenbendazole were 0.06 to 0.07ug/ml; the latter are eight to ninefold lower than the LC90s of amphotericin B that were obtained. <

Chemical Information
Molecular Weight 299.35
Formula C15H13N3O2S
CAS Number 43210-67-9
Form Solid
Solubility (25°C) DMSO
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
Conversion of different model animals based on BSA (PMID: 27057123)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.


[1] James B Collins, et al. Impact of fenbendazole resistance in Ascaridia dissimilis on the economics of production in turkeys

[2] Atefe Saemi Soudkolaei, et al. Anthelmintic efficacy of fenbendazole and levamisole in native fowl in northern Iran

[3] Long Chang, et al. Dewormer drug fenbendazole has antiviral effects on BoHV-1 productive infection in cell cultures

[4] Haroldo C de Oliveira, et al. Fenbendazole Controls In Vitro Growth, Virulence Potential, and Animal Infection in the Cryptococcus Model

[5] Qiwen Duan, et al. Fenbendazole as a potential anticancer drug

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Keywords: Fenbendazole supplier, Parasite, inhibitors, activators

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