Does Dieting & Exercise or Adhd Meds Cause Botox to Wear off Quickly?

I had botox done on my forehead and around my eyes. After about 45 days, those wrinkles had come back. I had been dieting and exercising and I use adhd medicine. I was told all of this could have caused an increase in my metabolism which in turn could have caused this. But, now I'm concerned because botox worked great except that. And it is too expensive 4 me to have done every 45 days. Is this correct and if so, what can I do?