In Lars von Trier's script, the main characters were in their 20s. Director Thomas Vinterberg decided to change it, so they became children instead. Lars von Trier later stated that he thought the age change was a brilliant idea.
Both director Thomas Vinterberg and screenwriter Lars von Trier state that there is no hidden meaning or message against weapons in the film, and that the story is not meant as a political allegory against guns or America.
Director Nicolas Winding Refn stated in an interview with Mads Brügger on Den 11. time (2007), that Lars von Trier offered him the chance to direct this film, but he declined (6th September, 2007). According to Refn, it was largely because he felt von Trier was condescending to him and ignored his request of help in negotiating a deal so Refn could buy back the rights to the original "Pusher". Refn says he had told von Trier how important it was to him and was hurt when von Trier seemed to ignore his plea.