Are you no longer seeing the desired results of Botox injections? If so, it's possible that your body has developed antibodies against the toxin. Fortunately, immunogenicity is thought to disappear after a period of time, so you can switch to a different brand of toxin and use Botox again. It's highly unlikely that someone will stop responding to Botox completely. While our bodies are capable of detecting foreign proteins and creating antibodies against them, resistance to Botox usually only causes a weakened response.
To try and get the desired results, you can switch to other types of neurotoxins such as Jeuveau, Dysport, or Xeomin. However, keep in mind that all of these neurotoxins have very similar chemical structures, so there's a chance that you won't see the results of the other types either. If you're still not getting results, you may be one of those rare people who are “immune to Botox”. In this case, alternative wrinkle reduction therapies such as microneedling may be a better option for you. You can also try a BOTOX treatment plan plus injectable fillers to plump your skin and maintain a youthful appearance. It's important to note that the success of Botox injections largely depends on the technique and it's also quite possible to get a “bad” batch that isn't fresh (and therefore less effective).
The risk of this happening is much higher in salons and other non-medical or quasi-medical facilities, as only licensed doctors can obtain authentic BOTOX or Dysport. Finally, it is much safer to undertreat with BOTOX. There's nothing you can do about it other than wait for the effects to wear off, so providers tend to be a little conservative the first time they work with a patient.
