Those of us involved in the marijuana legalization movement have long assumed that those companies that produce and sell competing products — especially alcohol and tobacco — were working behind the scenes to try to maintain marijuana prohibition and to protect their duopoly for legal recreational drugs. These industries have lobbyists who regularly work with state and federal elected officials to keep legal marijuana off the market. But we now see the pharmaceutical companies are also getting directly involved in political efforts to maintain marijuana prohibition, worried that legal marijuana will undermine their bottom line.