Parex Spot on Dog
Parex is an inexpensive way of treating ticks, lice and fleas for cats and dogs. The name of the medical product is Fipronil. For the treatment against flea infestations (ctenocephalides spp.). The product has a persistent insecticidal efficacy for up to 6 weeks against fleas. Although no immediate killing effect against ticks has been demonstrated(several ticks may be present after 48 hours), the product has shown a persistent acaricidal efficacy for up to 4 weeks against Dermacentor variabilis and up to 3 weeks against Rhipicephalus sanguineus.