Post to Forum

How long can Botox be used after it has been reconstituted?

  • knt
  • NC
  • 4 years ago

I was recently told that Botox does not need to be used right away after being reconstituted and that it can be kept in the refrigerator for "X" amount of time. I was injected recently with the same # of units as usual. (new clinician this time) The botox was not as efeective initially and now wearing off after less than 2 1/2 months. In previous injections it lasted at least 3 months or even 4 months. I wonder if it was "old" Botox this last time?

View 4 doctor answers to How Long Will a Vial of Botox Last?

Comments (2)

Botox generally starts to lose its effects at 3 months. By four months, the effects are gone. I'm not sure how long it can be kept in the refrigerator, nor am I aware of any studies that looked at this topic. However, I (an most of my colleagues in Beverly Hills) generally don't let a vial sit longer than 2 weeks.

Hi Knt, Maybe, or maybe the injections were not placed into the muscle, or maybe less units were used, there are many reasons for this. It is important to establish a good trusting working relationship with your injecting physician to avoid these types of problems. Good luck and be well. Dr. P