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Activyl Spot-on is the latest flea treatment for dogs and cats made by MSD. Fleas have shown no resistance to this innovative product which has a totally unique active ingredient, called indoxacarb. Activyl is supplied in pipettes of two different sizes for cats and five different sizes for dogs, so that each animal receives just the right dose for its bodyweight. One pipette is used per month to maintain effective flea control on puppies and kittens from 8 weeks of age..
Activyl is the first product designed to achieve flea control through the use of "metabolic activation, or bioactivation". It is applied once every month to the surface of the skin where fleas take it up and they then convert it into a highly active metabolite. The drug in Activyl has very little effect without the activation until it is taken in by a flea or other insect, so the possibility of toxicity to the base ingredient is very slim. Mammals are not able to activate the compound in this way and so are not exposed to the active insecticide by licking at their coat or swallowing hair - unlike other spot-on treatments.
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Below are some recent questions we've received regarding Activyl Spot-on for Dogs & Cats, including answers from our team.
I was given this on saturday 6th sept put on my cat.
How long does it take to kill all fleas?
In the early autumn of a year like we have had, it can take a long time!
This is because new fleas will be hatching out in the environment where
your cat (and other animals) have been going for the last few months.
Waves of new fleas might well be landing on your cat every day. They
will die off quite soon (a day or so usually if you applied the
treatment effectively) but more fleas will appear. I would suggest you
treat the house with product like Indorex after carefully vacuuming all the carpets and furnishings. You will get
rid of all the fleas in time, but it is rarely an instant result. It
depends on how effective your treatments have been over the last few
months and so what size the background flea population is.