The 51st State (also known as Formula 51) is a 2001 British film prouced by Focus Films (UK) directed by Ronny Yu, written by Stel Pavlou, starring Samuel L. Jackson, Robert Carlyle, Emily Mortimer, Ricky Tomlinson, Sean Pertwee, Rhys Ifans, Meat Loaf and Robert Fyfe. Most of the filming was done on location in Liverpool. For its U.S. release, the film was renamed Formula 51. Both names reference the drug — POS 51, which the film centres around — that is apparently "fifty-one times more powerful than cocaine, fifty-one times more hallucinogenic than acid, fifty-one times more explosive than ecstasy."