Nitroxinil is an anthelmintic, a veterinary medicine against parasitic worms in sheep and cattle.

The substance is active against the liver fluke the Fasciola hepatica and to a lesser extent against thread worms in the gastrointestinal tract.

Nitroxynil is also used against strains of the red gum worm (Haemonchus contortus) that have become resistant to benzimidazoles.

[citation needed] Nitroxinil was invented by May & Baker[2] in the mid 1960s as part of a program into investigation of derivatives of p-hydroxybenzonitrile.

It is usually injected subcutaneously into the animals in the form of the water-soluble ethylglucamine salt.