It is much like codeine about 90% as strong. Used in much the same way as codeine and ethylmorphine, primarily as a moderate strength analgesic, for eye surgery as a 1 to 2% solution, and as a cough suppressant. It was available in the United States prior to 1914 and was still used until the 1960,s, but fell into disuse once alternative opiate derivatives became preferred by doctors.