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Which drugs are effective against which worm

(in order of equine importance) and at which stages

copyright © 2001 Bentley House Stables

Ivermectin

Moxidectin

Fenbendazole

Pyrantel

(Eqvalan, Furexel)

(Equest)

(Multiwurma,Panacur,

(Pyratape P,

Equine Guard)

Strongid P)

Large redworms or strongyles

adult

effective

effective

some resistance

effective

developing encysted

effective

effective - 5 - day dose

inhibited encysted

effective - 5 - day dose

Small redworms or strongyles

adult

effective

effective

effective

immature

effective

effective

5 - day dose

Large roundworms (ascarids)

adult

effective

effective

effective

effective

immature

effective

effective

effective

Bots

(gasterophilus)

effective

effective (not all stages)

Lungworms

(dictyocaulus)

effective

Threadworms

(strongyloides)

effective

effective

7 x standard dose

Tapeworms

(anoplocephala)

double dose