What is the Percentage of Incidences Where Botox is Not Effective at All?

Hi there- it is possible that the Botox just hasn't had its effect yet (it usually does take a few days). I would give it another day or two, and then, if you still haven't seen any change, visit your provider. It's also possible that the Botox had lost its effect (this can happen if the vial of Botox was nearing the end of its useful period). If this is the case, I'm sure your provider will want to make this better for you.

I would still give it some more time.
It generally takes about 3-5 days for the Botox to take effect. Having said that, I have paitents in whom it kicks in the next day and others that it takes 5 days.
I myself have recieved Botox with little effect and I do believe that subtle variations in the manufactuiring process, chemical properties, delivery, preparation, administration, regional biological differences, etc can produce varying results with each injection session.
Give it some more time and notify your doctor after a week if you still see no response. It is possible that your doctor did not use Botox, but I doubt it. It is our overall goal to satisfy patients with great results so that they return and 'spread the word." Your doctor will likely want you to be happy. It's also important for them to get feedback if their product is not working.
I hope this helps.