Brand: PIRANHA ® Sheep Dip Lousicice


FORMULATION: «dip» for topical administration.

ACTIVE INGREDIENT(S): thiacloprid: 480 g/L = 48%

CHEMICAL CLASS of the active ingredient(s): neonicotinoid


PARASITES CONTROLLED (spectrum of activity)

  • Sheep body lice Bovicola (Damalinia) ovis, on short wolled sheep 10 days to 6 weeks after shearing


  • 48 mg thiacloprid/L clean water (equivalent to 48 ppm).
  • Do not add concentrate directly to the dip. Premix concentrate in a bucket of clean water first.
  • Initial charge: Dilute at rate of 10 mL Piranha Dip for Sheep in 100 litres of clean water. Accurately measure or calculate the volume of the dip prior to charging.
  • Topping up: Dilute at rate of 10 mL Piranha Dip for Sheep in 100 L of fresh clean water and top up when dip level falls by approximately 25%.


  • LD50 (acute oral) in rats: for the a.i. 621 mg/kg
  • LD50 (acute dermal) in rats: >2000 mg/kg
  • Estimated hazard class according to the WHO: II = moderately hazardous

Withholding periods (=withdrawal times) in days for meat & milk (country-specific differences may apply: read the product label)

  • Meat: 42 days (ESI 60 days).
  • Wool: 3 months.
  • Milk for human consumption: Do not use on female sheep which are producing, or may in the future produce, milk or milk products for human consumption. Thiacloprid and other

Thiacloprid and other neonicotinoids (e.g. imidacloprid ) have been associated with bee colony collapse worldwide. In April 2013 the EU prohibited for two years the use of several neonicotinoids on various crops due to suspected detrimental effects on bee colonies. However there is so far no evidence that use on sheep may have a detrimental effect on bees.

WARNING !!!: Never use on humans, dogs or cats.

You may be interested in the following articles in this site dealing with the general safety of veterinary products:


Risk of resistance? LOW, in sheep body lice.

This means that if this product does not achieve the expected efficacy against the mentioned parasites, it is likely to be due to incorrect use and not to resistance. Incorrect use is the most frequent cause of product failure.

Imidacloprid, a neonicotinoid insecticide was introduced for the cntrol of sheep body lice control in Australia around 2010. So far there are no reports on resistance or tolerance of body lice to imidacloprid in Australia or elsewhere. Thiacloprid belongs to the same chemical class, and if resistance to imidacloprid should develop, it must be assumed that thiacloprid would show cross-resistance. Other pests have already developed resistance to imidacloprid and other neonicotinoids (e.g. houseflies) in several countries. And in the past, body lice have developed resistance to several classes of insecticides (e.g. synthetic pyrethroids, benzoylphenyl ureas) in Australia. Consequently it must be assumed that they will sooner or later develop resistance to imidacloprid as well, particularly if it is uninterruptedly used for years. To delay resistance development Integrated Pest Management (IPM) practices are a must, including product rotation with with lousicides showing mechanisms of action different from that of imidacloprid.

Alternative chemical classes/active ingredients to prevent resistance of external parasites through product rotation:

These alternative products may not be available in all countries, or may not be available as pour-ons.

Learn more about resistance and how it develops.


Are the active ingredients of this product ORIGINAL* or GENERICS**?


*Meaning that they are still patent protected and generics are not yet available
**Meaning that they have lost patent protection and may be acquired from manufacturers of generic active ingredients other than the holder of the original patent.

COUNTRIES where this brand/product is marketed: Australia
GENERIC BRANDS available? NO, so far.

Click here to learn more about GENERIC vs. ORIGINAL drugs.

For an overview on the most used antiparasitic dips, spray, dusts or jetting fluids click here.


PIRANHA Sheep Dip Lousicice from BAYER (now ELANCO) is so far the only product containing thiacloprid approved for use in livestock in Australia.

Thiacloprid is a broad-spectrum insecticide introduced by BAYER (in the 2000s). There are so far no products containing thiacloprid approved for livestock in the USA, the EU or Latin America. Thiacloprid is abundantly used in agriculture, but not at all in livestock or pets, excepting this product. Thiacloprid is closely related to imidacloprid, another neonicotinoid abundantly used in pets against fleas. Thiacloprid does not affect ticks or mites. It has no effect whatsoever on internal parasites (roundworms, tapeworms, flukes, etc.).


This article IS NOT A PRODUCT LABEL. It offers complementary information that may be useful to veterinary professionals and users that are not familiar with veterinary antiparasitics. 

Information offered in this article has been extracted from publications issued by manufacturers, government agencies (e.g. EMEA, FDA, USDA, etc.) or in the scientific literature. No guarantee is given on its accuracy, integrity, sufficiency, actuality and opportunity, and any liability is denied. Read the site's DISCLAIMER.

In case of doubt contact the manufacturer or a veterinary professional.