Abstract: The present invention concerns a stable aqueous nanosuspension dosage formulation for injection to fish, comprising (i) an active ingredient which is lufenuron or hexaflumuron, each in form of particles having an effective average particle size of ?1000 nm; (ii) one or more surface stabilizers selected from the group consisting of a surfactant and a polymer or a mixture thereof; and (iii) water. The nanosuspension formulations of the present invention are especially suited for the treatment of salmon and provide prolonged effective protection against sea lice at sea.

Abstract: The present invention relates to the use of compounds of formula (I), wherein the variables are as defined in the description, in the free form or in salt form, for the manufacture of a medicament for controlling ectoparasites on a warm-blooded animal, wherein said medicament is administered orally to the animal at a dose of from 0.1 to 100 mg/kg from 30 minutes before to 3 hours after feeding the animal with an animal food.