It was originally meant to be a purely optional cure for mutants who wanted to become "normal" like humans. However, it was secretly deployed in weapon form by the U.S. government in case dangerous mutants threatened lives. After discovering this, Magneto used this as an excuse to try to destroy the source of the cure. The government then mass produced cure weapons for the military in anticipation of Magneto's attack. Many of these weapons were used during the Battle of Alcatraz Island to great effect before they were destroyed.