What did robitussin do to my body last night?

I drank a little, well a lot of, extra cough syrup (robitussin) with the active ingredient DMX to get high last night and I got way to loaded, I threw up twice and I felt like the world was upside down for a good two hours, could not focus at all. But I have 3 main questions.

First, what did it do to my body in terms of damage?

Second, How did my body take it, like is the syrup “digesting” like food or what?

And third, is there anything I should do today to flush it out or should I just go about my normal routine?

P.S. I’ll never do this again.