"Overdose" is a song recorded by American singer Ciara for her self-titled fifth studio album (2013). It was written by Josh Abraham, Oliver Goldstein, Ali Tamposi, Olivia Waithe and Ciara, while its production was handled by the former two. Ciara and Kuk Harrell were responsible for the song's vocal production. Notable for its shift from her more contemporary R&B sound towards a predominantly pop-orientated vocal style for the singer, "Overdose" served as a product of Ciara's experimentation and was recognized as the purest pop track on Ciara. An uptempo dance-pop, electropop and nu-disco song, its "club-friendly" production comprises rupturing synths and gritty, automatic beats. Its lyrical content act as an ode to codependency and are based on the subject of unhealthy infatuation.

"Overdose" initially leaked as an extended snippet on July 17, 2012, and then in full in June 2013. The song was originally recognized as a "fan favorite", before garnering favorable reviews from music critics, some of which went on to publish campaigns for the track be released as a single. Its accompanying artwork features Ciara's then-fiancé Future and resulted in widespread media attention for its provocative imagery. Though the song impacted urban contemporary and rhythmic contemporary radio in the United States—on September 18 and October 15, 2013, respectively—it failed to receive a full-scale single release, when its digital release was later cancelled and its accompanying music video and promotional performances failed to materialize. As a result, "Overdose" failed to enter the Billboard Hot 100 and garner success commercially.

"Overdose" was written by Josh Abraham, Oliver Goldstein, Ali Tamposi, Olivia Waithe and Ciara, while its production was handled by the former two. Ciara and Kuk Harrell were responsible for the song's vocal production, and Ciara's vocals were recorded by Ryan Williams at Pulse Recording, Los Angeles, CA. Background vocals on the track were provided by Ciara and House Aiello, and the song was engineered by Chris "TEK" Ryan. "Overdose" was mixed by Jaycen Joshua, with the assistance of Trehy Harris, at Larrabee Sound Studios in North Hollywood, CA. The song was then mastered by Dave Kutch at The Mastering Palace in New York City, NY. In an interview with GQ, Ciara discussed the development of "Overdose": "The song's got a throwback '80s vibe with a modern twist; I think that's unexpected. It's more a product of my experimentation—it has a vintage-y feel, but I feel like everyone can love it. And what's better than to dance to the feeling of love? The song's about embodying that energy."

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