Insomniac is the fourth studio album by American rock band Green Day, released on October 10, 1995 by Reprise Records. Recorded as the follow-up to the band's multi-platinum breakthrough Dookie, Insomniac featured a heavier sound and bleaker lyrics than its predecessor. Lyrically, the album discusses themes such as alienation, anxiety, boredom, and drug use. It received generally positive reviews from critics, who praised frontman Billie Joe Armstrong's songwriting and sarcastic sense of humor. Four songs were released as singles, "Geek Stink Breath", "Stuck with Me", "Brain Stew / Jaded", and "Walking Contradiction".