1868 H. B. Day (title) The opium habit, with suggestions as to the remedy.
1892 H. Campbell xxviii. 569 ‘I've got the yen-yen (opium habit) the worst way’, said one woman, ‘and must have my pipe every night’.
1995 (Electronic ed.) 15 June He..sold her into a form of discretely suggested prostitution in order to feed his own opium habit.