Botulinum A resistance. How long should I wait before trying Xeomin again?

Hi there,
This issue of toxins not working at all or not lasting long enough has been the subject of debate and discussion since everyone got vaccinated.
We find this problem with all neuromodulators: botox, Xeomin, and Dysport. It probably has to do with the immune system post-vaccination. However, no studies are there to support this. It's only an observation amongst Cosmetic Physicians.
Fractional resurfacing for the forehead will not work as the issue is the forehead muscle which will mainly respond to a neuromodulator
I would just try retin A for prevention, give a wash-out period of 6 months, and then re-try with the toxin of your choice.
Hope this helps.
Cheers

There are other products on the market that you can try.
Dysport may work and there is also Juveau as well.
Discuss with your physician.

Best of luck!