For the prevention of heartworm disease, Senergy must be applies monthly, preferably on the same date each month. We recommend, (and most guarantees require) that Senergy be used year-round, although some veterinarians may recommend using it only during mosquito season. If used seasonally, the first dose must be applied within 30 days of your pet's first exposure to mosquitoes. The last dose must be applied within 30 days after your pet's last exposure to mosquitoes. To control fleas, apply the first dose one month prior to the expected start of flea season. Part the hair on the back of the pet at the base of the neck in front of the shoulder blades. Place the tip of the tube on the skin and squeeze the tube 3-4 times to empty the entire contents on the skin. Do not massage into skin or apply to broken skin. Do not apply when the haircoat is wet.

Not for human use. Keep out of reach of children and animals. In humans, Senergy may be irritating to the skin or eyes.