# The Veterinary Medicines Regulations 2005, Paragraph 4: The active substance


The veterinary medicinal product must only contain an active substance specified in the following table for the species specified in that table.
Permitted substances and target species
Substance
Fish
Cagebirds
Pigeons
Amprolium hydrochloride
Y
Carnidazole
Y
Clazuril
Y
Cypermethrin cis50:trans50
Y
Dimetridazole
Y
Febantel
Y
Fenbendazole
Y
Levamisole Hydrochloride
Y
Piperazine dihydrochloride
Y
Piperonyl butoxide & Pyrethrum powder 1.3%
Y
Y
Pyrethrum extract 25% & piperonyl butoxide
Y
Y
Tricaine methane sulphonate
Y

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Source: https://www.legislation.gov.uk/uksi/2005/2745/schedule/6/paragraph/4 (the official version)
Page: https://openlegislation.uk/veterinary-medicines-regulations-2005/schedule-6/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.