What was in the gum?

I was sitting in the bus and there came 4 man sitting next to me. Then one of them gave me chewing gum and I took it. (Don't ask why I was so stupid) When I started chewing it a strong mint flavour came out and after 10 seconds my mouth began to feel numb and I couldn't swallow. I started feeling dizzy and I took it out my mouth. It has a beige colour. What is it? Why would they try to make someone sleep in on a full bus of people? I am still a bit in shock, happy that I have fast reflexes
What was in the gum?
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