In the past month... Have you ever thought your [named drug] use was out of control? Never (0) Sometimes (1) Often (2) Always (3) Has the thought of not being able to get any [named drug] really stressed you at all? Never (0) Sometimes (1) Often (2) Always (3) Have you worried about your [named drug] use? Never (0) Sometimes (1) Often (2) Always (3) Have you wished that you could stop? Never (0) Sometimes (1) Often (2) Always (3) How difficult would you find it to stop or go without? Not difficult (0) Quite difficult (1) Very difficult (2) Impossible (3)

Score ≥4 is positive for substance dependence      Source: adapted from reference 20