Losing Sleep
Losing Sleep may refer to::

Music
Albums
Losing Sleep (Axle Whitehead album), 2008
Losing Sleep (Edwyn Collins album), 2010, or its title track
Losing Sleep (Parachute album), 2009
Losing Sleep (Chris Young album), 2017

Songs
"Losing Sleep" (John Newman song), 2013
"Losing Sleep" (Chris Young song), 2017
"Losing Sleep (Still, My Heart)", a composition by Vangelis

Other
Insomnia