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Coumaphos is an antiparasitic active ingredient used in veterinary medicine in dogs and livestock against external parasites. It is not used against agricultural pests. It belongs to the chemical class of the organophosphates.

Coumaphos is a broad-spectrum organophosphate highly effective against most external livestock and pet parasites (flies, ticks, mites, lice, fleas, mosquitoes, etc.) but is completely ineffective against internal parasites when administered topically (i.e. on the skin).

 

As most organophosphates, coumaphos products are used for topical administration, either as concentrates for dipping or spraying or in ready-to-use products such as dressings, dusts, and ear-tags for livestock; and as low-cost topicals for dogs such as shampoos, soaps, sprays, etc. In the past coumaphos was also used for oral administration to livestock as an anthelmintic drench. Nowadays coumaphos is scarcely used in livestock and pets because it has been replaced by newer, more effective and less toxic compounds.

Resistance to all organophosphates is already very frequent worldwide, particularly in cattle ticks, houseflies, mosquitoes, fleas, etc.

The table below indicates some usual dosing recommendations for coumaphos issued by manufacturers or documented in the scientific literature. They may not be approved in some countries.

Dosing recommendations for COUMAPHOS
DOGS
Delivery Parasites Dose (against coumaphos-susceptible parasites)
Dip, spray Fleas, ticks, lice, mites, etc. 200-500 ppm (=mg/L) in the wash
CATTLE
Delivery Parasites Dose (against coumaphos-susceptible parasites)
Dip Ticks, mites ~1050-2550 ppm (=mg/L) in the wash dep. on indications
Spray Ticksflies, lice, screwworms ~500-2100 ppm (=mg/L) in the wash dep. on indications
SHEEP & GOATS
Delivery Parasites  Dose (against coumaphos-susceptible parasites)
Dip, spray Ticks, lice, mites, etc. 200-500 ppm (=mg/L) in the wash dep. on indications
SWINE 
Delivery Parasites  Dose (against coumaphos-susceptible parasites)
Spray Lice, mites 200-500 ppm (=mg/L) in the wash dep. on  indications
HORSES
Delivery Parasites  Dose (against coumaphos-susceptible parasites)
Dip Ticks ~1000-2000 ppm (=mg/L) in the wash dep. on indications
Spray Ticks, flies, lice, screwworms ~500-2000 ppm (=mg/L) in the wash dep. on indications

DISCLAIMER: Liability is denied for any possible damage or harm to persons, animals or any other goods that could follow the transmission or use of the information, data or recommendations in this site by any site visitor or third parties.

Dosing recommendations for antiparasitics depend on national regulations. National regulatory authorities determine whether a product is approved for a given indication, i.e. use on a particular host at a specific dose and against a specific parasiteCheck the labels of the products available in your country for specific information on approved indications.


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