How Long Can Open Restylane Last if You Are Getting Touch Ups?

Any physician or less who is saving Restylane is probably cutting corners elsewhere as well. The practice of 'saving' fillers is one that is fraught with problems ranging from the potential of mixing it up with other product to becoming contaminated. Even if it doesn't have any of these issues, just the concern of either of these is enough to keep most reputable physicians from doing this.
Those that don't are skating on thin ice and if they are willing to flaunt the rules and recommendations for this, they are most likely to do that for other things. You don't want to put your safety in their hands.

We also discard any remaining products once they are opened - I don't believe the companies advocate saving and reusing products and there is no safety data to advocate doing that. The issue of possible contamination is not worth saving several hundred dollars.This is not something that is practiced in the U.S,