How long before seeing results? I've had Xeomin injections twice now and I only see a slight improvement at this time.

Xeomin
(incobotulinumtoxinA, also called botulinum toxin type A), is made from the
bacteria that causes botulism. Botulinum toxin blocks nerve activity in the
muscles, causing a temporary reduction in muscle activity. It should effect the
area 3 to 6 days after injection. But if the wrinkles are very deep you should
only see that it dispel just a little bit.

I suggest you go to a reputable office to get treatment . In my practice we do it based on dose, after 2-4 weeks if more is needed we add more.  However, exercise and facial movements can have effect on how long a product lasts despite dose so if more is needed there is charge.  It doesnt always last 3 or 4 months it sometimes starts to dials down 1-2 months and then more dose is needed.  Or you must switch to an alternative product to see if that one works better for you. Best, Dr. Emer.