Side Effects is an EP by the Danish singer-songwriters Mads Langer and Tim Christensen, released on July 19, 2014, through RCA and Sony Music Denmark.

[3][4] In March 2014, it was announced that Langer and Christensen would perform together during the Grøn Koncert tour in July 2014.

After an acoustic set, they were joined on stage by bassist Søren Balsner of Carpark North and drummer Birk Nevel.

[6] Langer and Christensen wrote four new songs for the EP, and added a mashup of Langer's 2008 song "Fact-Fiction" and the 1993 hit "Silverflame" by Christensen's band Dizzy Mizz Lizzy, which was first played in the DR3 show DR3 Popper Op on February 16, 2013.

[7] "Bringing Back Tomorrow" was released as a single on June 2,[8] followed by "Fact-Fiction / Silverflame".