Well dont take corcidin to get high because it has an extra ingredient which is dangerous and might kill you.

Other than that, i dont know what hes talking about up there ^. I have taken dxm like a billion times and every time I have been able to sit in front of my parents at the dinner table, go to the movies (really cool), go camping, have conversations with relatives all without them even getting suspicious. All that happens is you look really tired and stuff and your pupils might get big but not for me. This is with 300 mg or less...

But I dont know about like 600 mg or more because I havent done that much.

If you are only taking 240 mg you should be fine but I would advise you not to use corcidins.. get robitussin 8hr coughgels at a gas station and take all 20 pills... but you will act fine

and if you do fall asleep after your done tripping (at least 8hrs long maybe more) then you will feel light headed when you wake up.