I don’t know how much less the Walmart version is, but for something as persistent and pervasive as fleas with their many life cycle forms, I would be extremely reluctant to cheap out on this one.
It may be the same ingredient but is the concentration percentage of active ingredient be the same?
Is the dispersant solution the same? How could one tell?
In the world of human medicine, I’m aware that generic drugs are regulated by Federal law to be sure that the ingredient levels are the same. And most of the time this works fine.
However, I have read of cases where it’s not only the active ingredients which determine it’s effectiveness. There is also something known as bioavailability and dispersant rates which can vary significntly from onecompany’s formulation.
This has shown up specifically in some time release formulations and heart medications. In cases where a steady amount of medication in the body system is critical, only the brand name has the consistent effect needed.
I don’t know how much oversight there is for Veterinary medications.
From past personal experience with Frontline and several lengthy conversations with cust. svc. operators at the company, I know that aconsistent level of the ingredient for three months will eradicate all fleas in whichever cycle they are completely as long as it is applied once every 30 days. But you can’t let the intervals be longer than 30 days apart or you’re messing with the system and it gives the little buggers time to re over and regenerate.
In addition to using the Frontline, I also went over my cats with a fine toothed comb (LITERALLY) to see how many fleas I could remove from them.
What I noticed was that after 24–48 hours after starting each new dose, there was not a live flea to be found for at least a couple of weeks.
However, towards the end of each 30 day period I was getting more and more fleas with each combing. Granted, they were smaller and many in a less active (weakened) state.
But I didn’t need to be convinced to not let it go a longer interval a I did them a day of two early just to be on the safe side.
But because of the daily combing, I was able to see it with my own eyes. And three months later my kitties were totally flea free.
But this is for indoor only cats. There weren’t any new fleas from outside hopping on them. For cats who go outdoors at all, I guess one would have to dose them every 30 days until the first frost which would kill them off until next spring.
Personally, I would be reluctant to use a generic version unless the company making it could prove that it’s identical in EVERY WAY ( active and inactive ingredients with same concentration).
but I have a hunch they’d be unwilling (or unable) or both to do that :)
Companies are not eager to disclose their propietary formulas.