april 5, 2019. switzerland: βk-2c-b is a controlled substance specifically named under verzeichnis e., united kingdom: βk-2c-b is illegal to produce, supply or import under the psychoactive substance act as of may 26, 2016. united states: βk-2c-b is unscheduled in the u.s., but may be considered an analogue of 2c-b under the federal analogue act, and thus a schedule i drug. hazards no hazards specifically for βk-2c-b have been reported, but there are some common hazardous effects found in 2c-phenethylamines which could be present for βk-2c-b. these include chills, nausea, anxiety, confusion, agitation, hypertension, seizures and death. use of βk-2c-b may lead to hallucinations and violence, as well as dis-coordination; these could have severe consequences, not only for the user, but also the general public. the severity of such effects occurring depends on the dosage, with the risk increasing at higher doses. both the us and uk have reported both non-fatal and fatal intoxications with 2c-phenethylamines and substitutions of this family of psychoactive substances.