What's the exact name of the box of CCC's that're safe to take? Gonna go pick some up for the first time, I need to make sure I get the right box.
CCC's in general are notoriously unsafe for DXM tripping. You need to read this (The DXM FAQ): http://www.erowid.org/chemicals/dxm/faq/ I'd go with something containing ONLY DXM personally. But that's just me. If you wanna know what you're getting yourself into, you just gotta read the ingredients.
Robitussin DX or the Robitussin gel pills are the way to go. Like already stated Triple C's are unsafe and aren't recommended.
to answer your question simply, coricidin, cough and cold (with dxm in it ofcourse.) if youre gonna buy an otc dxm product, i say get liquid robotussin and tough out drinking the whole bottle. less harmful on your liver than trip c's. but still i dont recommend taking cough medicine to get high. one time in highschool i was tripping on dxm, i had to go to the bathroom because i thought i shit my pants. luckily i just sat in a wet spot.