Songfacts®:

• Truth Serum documents a failed relationship. The final track of the EP finds someone telling Tovo Lo that "time will heal" her broken heart. She responds with a yell: "Are you kidding me?"
  
  "I've always wanted my music to have that desperation," the Swedish singer told the BBC, "where you just want to strip your clothes off and run down the highway. I want the feeling where you don't really know what to do with yourself - in the vocals, in the production. Everything."
• The song also featured on Tove Lo's Queen of the Clouds album, which she told Artist Direct, "is three chapters of how things usually go for me in a relationship."
  
  This track comes after the end of the romance having got over the initial pain and heartbreak. "It's when you moved on and you're sort of okay, but you still have that little scar. It will always be there," Tove Lo explained. "Those thoughts about this other person will always haunt you a bit."
  
  "In the video, I have these ghosts chasing me," she continued. "When you go through something like that, it always sticks with you."