Part 2 - Theory in Practice
With all that behind us, let us examine our available choices.
A) Systemic insecticides
We shall begin with the Systemic, that is 'whole body' insecticides, as these are currently the standard against which others are measured.
These include Frontline,Advantage, Revolution, Assurity and Comfortis.
1) Frontline- Currently the standard. Provides very good flea prevention for at least a month. Washable, reasonably useful against ticks.
2) Advantage- Similar to Frontline. Has never been as popular. A reasonable alternative.
3) Revolution - Combines flea protection with heartworm prevention, throws in ear mite protection, kills some other parasites as well. A good drug, the main problem being that 'flea season' and 'heartworm season' do not coincide, so you are paying for something you don't need for part of the year. if you use year round heartworm prevention, plus year round flea prevention, then this is a good choice.
4) Comfortis- Unlike the others, a tablet instead of a topical application. A relatively new drug that has been having excellent results, especially in very difficult flea areas like Florida. May well turn out to be the 'next big thing'. Downsides - no effect at all on ticks, causes more stomach upset than we would like.
5) Assurity - The same medication as Comfortis, but for cats, and a topical. Again a new drug, there have been problems with skin irritation and hair loss where it has been applied (this can be significant), but time will tell.
6) Capstar - This one is different. It does an amazing job of killing every flea on the dog and starting with a 'clean slate', but has no residual effect. It is a good place to start with a badly infested dog, or, for example, one who has picked up fleas from a stay at the Animal Shelter and is returning to a flea free environment, but in general must be used along with a residual acting drug, for reasons discussed when we started. However it really works for what it does, and a good and useful drug for many situations.
B) IGRs -
Generally, as we shall see , these are combined with other medications which actually kill the fleas.
The only two common 'stand alone' IGRs are Program and Sentinel.
7) Program - The first of the 'new wave' of flea products which appeared about 20 years ago and changed the face of flea control. Still around, still a good drug, but probably superseded by better ones.
8) Sentinel - Program plus a heartworm preventative, which , like Revolution , brings up the problem that some times of the year you need one but not the other.
C) Topicals -
This would include sprays, powders, shampoos, dips, etc. Also included are topical 'pyrethrins', such as the ones from Pet Stores with names like 'X__X -Spot' . (I don't want to name names.) Most of the spot pyrethrins seem to be both somewhat toxic and not particularly effective. Old fashioned pyrethrin flea spray, (or 'permethrin' - long acting pyrethrin), however , should not be discounted. They can be VERY useful on short haired dogs, especially those with flea allergy. This group would also include collars, but as we firmly believe they are of little use for fleas we shall discuss collars in the tick section, where they are important.
9) Vectra - A 'second generation' pyrethroid which apparently gives better coverage and can be more effective. As topicals kill the fleas before they bite, this can be a good choice, and we often use it, for flea allergic dogs.
D) Combination medications-
So much for the easy part. In looking for the next stage in the evolution of flea control beyond the Program/Frontline/Advantage era, several companies are marketing drugs combining ingredients from the different classes listed above to increase effectiveness.
10) Frontline Plus combines the systemic Frontline with an IGR, so that if any fleas survive to feed they will be sterile anyway.
11) Advantix combines the systemic Advantage with a permethrin topical. Not to be confused with Advantage Multi, which contains heartworm preventative.
12) Parastar Plus combines the ingredient of Frontline with a second generation pyrethrin type topical. It is a new product, but like Vectra the topical may be of more value than the standard permethrin/pyrethrin.
13) Certifect combines the ingredients of Frontline Plus with amitraz- the best of the tick preventative medications. We shall hear more of it in the tick discussion.
14) Trifexis combines Comfortis with heartworm prevention.
Putting it all together-
So 14 different drugs, all useful in a given context. As you can see, this is why 'What do you recommend for fleas?' is not a question that gets a one word answer.
(Admittedly, at our hospital very few questions do.)
We generally advise that flea control and heartworm prevention be handled separately. They are needed at different times of the year, and some flea seasons are worse than others. However if you wish to be on both year round this is feasible and we can discuss options.
In our area fleas are largely an August to October phenomenon. People think of fleas as a heat of the summer problem, but it actually develops in late summer and peaks in early fall. Every July we hear ' This has been the best summer for fleas ever!' Every November we hear, ' The fleas have never been this bad!'.
Major flea problems seem to show up on August tenth like clockwork, but of course if temperature and humidity are optimal they can occur much earlier.
Our current standard recommendation for flea prevention in the uninfested dog would be one of the fipronil, (this is the active ingredient of Frontline we have referred to so often), products, with application being started in mid-June at the latest. Frontline itself is fine, though we are tending toward Parastar, as it is no more expensive and useful for flea allergic dogs. Parastar is what I am using on my dog. Comfortis is a very good alternative.
For severe infestations with an infested house, for multiple pet households especially with cats involved, for tick control and for other individual situations... well, that is why we have fourteen products. We will be happy to try and sort out what is best for your particular situation - hopefully this guide will give you some idea of the available choices.
Coming soon - Ticks!