"Insane in the Brain" is a song by American hip-hop group Cypress Hill, released in June 1993, by Ruffhouse and Columbia Records, as the first single from the group's second album, Black Sunday (1993). The song was written by group members Louis Freese, Lawrence Muggerud and Senen Reyes, and produced by Muggerud. In addition to hitting number one on the US rap chart, it also was a mainstream hit, reaching number 19 on the Billboard Hot 100 in 1993. "Insane in the Brain" earned a 3× platinum certification from the Recording Industry Association of America and sold 3,000,000 copies domestically. The accompanying music video was directed by Josh Taft, featuring the group performing at a rave with strobing effects and "psychedelic" colorations.