e. Are you an unlawful user of, or addicted to, marijuana, or any depressant, stimulant, or narcotic drug, or any other controlled
substance?
This question has been on the ATF Form 4473 for many, many years. So the ATF has been asking about, and denying firearms ownership based on drug use for quite a while now. I have read of with people who have been denied because they answered this question affirmatively, based on their use of narcotics for chronic pain, for example.
Edited to correct spealling