Virbac USA veterinary site
Note, content for veterinary professionals only.

SENERGY™ (selamectin)

Selamectin is the #1 vet-recommended feline parasiticide.

Our new smart option, SENERGY™ (selamectin) Topical Parasiticide, offers parasite protection for kittens, cats, puppies, and dogs that can be used all year—all at a great value!

  • SENERGY™ (selamectin) is safe to use in kittens from 8 weeks of age and also for puppies from 6 weeks of age and with lactating and pregnant queens and bitches
  • Indicated for foundational protection against heartworm, adult fleas, flea infestations, ear mites, hookworm, and roundworm in cats
  • Well-controlled clinical studies  in which Selamectin was used in animals receiving other frequently used veterinary products such as vaccines, antihelmintics, antiparasitics, antibiotics, steroids, collars, shampoos and dips.
  • SENERGY™ (selamectin) is available in three different size ranges for cats and six different size ranges for dogs



SENERGY™ (selamectin) is well tolerated. All dogs and cats should be tested for heartworm disease before starting a preventive protocol. Use only on cats 8 weeks and older and on dogs 6 weeks and older. Digestive and skin side effects have been reported. In people, SENERGY may be irritating to the skin and eyes. Wash hands after use. For complete prescribing information, contact Virbac at 1-800-338-3659, or



ACTIVE INGREDIENTS: The content of each tube is formulated to provide a minimum of 2.7 mg/lb (6 mg/kg) of body weight of selamectin. The chemical composition of selamectin is
(5Z,25S)-25-cyclohexyl-4'-O-de(2,6-dideoxy-3-O-methyl-α-L-arabinohexopyranosyl)-5-demethoxy-25-de(1-methylpropyl)-22,23-dihydro-5-hydroxyiminoavermectin A1a.