Neither is good for you, but Coricidin is FAR worse. DO NOT USE CORICIDIN. It's an extremely dangerous and unhealthy way to use DXM. Any DXM product you use should contain just DXM and nothing else, period. As for Delsym, meh. It's good for a longer high but not that great for a trip, and trip doses would be more dangerous than with something like Robitussin.