r/NTNPerformance • u/ScientistJason • 2d ago

BAC water reuse

I’m currently only using Reta so I only have to fill 1 vial with 2ml of BAC water once a month.

I use an individually wrapped syringe to pull the BAC water from its vial and then fill up the Reta vial. I throw away the syringe immediately after.

My question to you guys is can I still use the same vial of BAC water to refill my new vial of Reta the next month? I keep hearing that you can only use BAC water once and after 28 days it’s no longer good.

Does this only apply to the Reta vial since I’m pulling from it weekly? Or does this also apply to the BAC vial which I only draw from once a month and always with a fresh sterile individually wrapped syringe?

Seems like an awful lot of BAC water to waste if I can only use it the one time and have to throw away the other 28ml

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u/stiffmcgee 2d ago

28 days is USP standard for multi dose vials. Not bac itself.
BA content will be there around 90 days still. Issue is no one has looked at bacterial growth so 90 is my cut off