Dear Dr. Ellie:
We are wondering if we can use the generic/store brand that seems (and claims) to be the exact formula as Listerine, such as Wegmans brand.
I do not recommend store brands of ACT since they do not have the same “cling” power. With “less cling” there will be less time for the active ingredient to linger on the tooth surface and this appears to produce a less favorable outcome.
In the case of Listerine this would not be an issue. If you trust the brand I agree that it would seem an OK substitute. On the other hand, Listerine can be purchased in huge containers at very low price so you know you have the real thing.
The only way for me to really answer your question would be to run a clinical trial and compare the outcomes over time.
As you may imagine, this is not immediately possible (although maybe Wegmans might want to sponsor a trial of this kind in the future!)
Not the perfect answer but the best I can do!
Dr. Ellie Phillips