How long can Kybella be stored once the vial has been open?

As my colleague noted, kybella is stored at room temperature, and if recapped and sealed, it should be fine until the expiration date.  Having said that, I find your question a bit curious, as I have never stored an open bottle.  When treating the soft tissue of the neck, I usually use 2 full vials per treatment.  Even with "off label" uses, such as jowls or fullness in the axilla or knees, I have never injected less than a full vial and have never had to consider storage issues.  Make sure to see a certified physician and experienced Kybella injector to make certain that your outcome will be optimized.  

Hi.  I have never opened a vial of Kybella and not used it in its entirety.  Like my colleagues, I never use any less than one or two vials per treatment and would not store an open vial of kybella. Thank you for your question.