(Salem, OR) -- Oregon's Attorney General has filed a lawsuit against several pharmaceutical companies for keeping a generic version of testosterone replacement gels off the market. The market to sell the gel to men with low testosterone levels has sales of one-billion dollars a year. The lawsuit alleges AbbVie, Abbott Laboratories, Unimed Pharmaceuticals, and Besins Healthcare filed sham patent litigation to keep other companies from producing a generic version of the drug, which led to extremely high prices. The lawsuit seeks to take the excessive profits the companies made from selling the drug AndroGel.