Important to understand the difference, dosages are very different. 100mgs of DMT is the trip of a lifetime, 100mgs of 5MEO-DMT is a trip to the morgue. They only sell the stuff for research, but they don't check credentials all that hard. 20mgs is a good dose of 2c-i, maybe a little much for a first time, depends on how experienced you are with phychedelics, and how hard you like to trip.