Where can you buy prevention mouthwash?

Your dentist is the one that would have to give you a prescription. There are medical mouthwashes available but except for ones such a Listerine ect most are by prescription only.

prevention mouthwash is available at my local walgreens, for petes sake.

Walgreens no longer has Prevention Mouthwash!

I actually buy it directly from the manufacturer. I buy it by the box and its a good price. No prescription necessary.