Business Insider told you back in October that Instagram was rife with dealers and users, some of whom posted clearly identifiable information about themselves.
It's not clear which words have been banned. A search for "marijuana" and "oxycontin" this morning yielded a bunch of results - people are still using those tags - but no obvious pictures of people dealing.
Instagram's terms of service have long banned images used for "unlawful" activity.
Recently, Instagram banned a bunch of controversial or crude hashtags - including #sex, #thinspo and #whitepower - as it prepares to ramp up its