2C-B is a psychedelic drug, and has been illegal in the United States since 1995 (it is also illegal in Canada).
Little formal research has been conducted on 2C-B, despite being labelled a "imminent hazard" to the public by the United States government. Some experimental and anecdotal evidence suggests that its effects are less severe, shorter in duration, and more manageable than other, more commonly known and available psychedelics such as MDMA.
Psychedelic drugs are typically considered those which alter the perceptions of the subject in ways unrelated to the "normal" functioning of the brain. 2C-B users report that objects appear to change color, shape, position, size and so forth while under the effects of the drug. Synthetic drugs such as 2C-B have experienced an extended surge in popularity as trends in harder drug use have shifted away from cocaine and heroine in recent years.