DOI is a psychedelic amphetamine that was first synthesized by Alexander Shulgin, who described it in PiHKAL (1991). It has been used recreationally and is a common scientific research tool.
Like other members of the DOx class (e.g. DOM), DOI has a long duration of action. It’s not uncommon for people to be incapable of sleeping for 24 hours or more, particularly with strong+ doses.
Overview Page (Including References): thedrugclassroom.com/video/doi/