This anthelminthic is extensively used as veterinary medicine to control gastro-intestinal helminthes, liver flukes and lungworms. It enters into the environment primarily through its excretion, 98% in faeces
Halley BA, Nessel RJ, Lu AYH, Chemosphere. 1989. 18, 1543-1563.
Ivermectin may be stored for long periods in soil.
Mougin C, Kollmann, A Galtier P. Envir Chem Lett 2003, 1, 131,-134.
The potential of anthelminthics to affect dung decomposition is well known, affecting dung beetles, dung flies and epigeic eathworms.