"Otherside" is a song by the Red Hot Chili Peppers, released in 2000. It was the third single from their album Californication, and confronts the battles addicts have with their prior addictions. The single was highly successful peaking at number 14 on the Billboard Hot 100, the fourth highest ever for the band; and number one on the US Modern Rock Tracks, which was, at the time, the fifth for the band. The song remained at number one on this chart for 13 consecutive weeks, one of the longest runs at the top of that chart.

This song refers to one of the band members, Hillel Slovak who died of a heroin overdose on June 25, 1988. This song talks about his struggles from this addiction. The name of the song, "Otherside", is also used to say "afterlife".

Although it is sung by Anthony Kiedis, it is supposed to be Slovak's voice and his perspective towards the situation. This song talks about how Slovak knows how much the drug has affected him and how he must kill himself to end his addiction. This song also shows his struggles to end this addiction by saying, "I yell and tell it (drugs) that it's not my friend; I tear it down tear it down, and then it's born again." His constant struggle is also shown in the music video which shows a man waking up and then finding himself in the same position at the end of the video which means that it is a cycle that never changes and that never will change. The video also shows his struggles by having a scene where the man (Slovak) is fighting against his shadow which shows that he was initially fighting with himself due to the addiction.

The music video has also been interpreted differently in the past; some sources speculate that the beginning and end scene are one and the same, and that the events between them are flashbacks outlining the protagonist's (Slovak's) journey to this state.

This song is not only a commentary of Slovak's struggles but also demonstrative of the adverse effects of drug use as a whole.

The video was directed by Jonathan Dayton and Valerie Faris in a black-and-white/monochrome Gothic style similar to Robert Wiene's The Cabinet of Dr. Caligari, all influenced by German Expressionist art. Elements of Cubism and work by the graphic artist M. C. Escher are also seen in the video.

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