What kind of drug is used for botox injections?

Hi, everyone. Does anyone has taken Botox injections? How was your experience? Is it painful? What kind of drug is used for botox injections? Recently when I was browsing, I came to know about a medical aesthetic center that provides botox injections in Oakville. When I asked about this aesthetic center to my friends in Oakville, they also have good opinions about this aesthetic center. I think by approaching them, my needs can be fulfilled. What is your opinion guys? Do I need to approach them?