[reposting because I made a reference to promethazine being related to codeine, which yes, I realize is a different drug. Sorry.] Getting legal codeine definitely isnt easy but if you happen to live in a legal US state, yes, it is possible to buy codeine. Codeine is an opiate used to treat pain, coughing, and diarrhea. It is typically used to treat mild to moderate degrees of pain. Greater benefit may occur when combined with...