Table 1 Interview topic guide

1

Which routes of administration do you use for DAM and illicit substances?

2

What is the reason for the respective route of administration and in particular the reason for the intramuscular (IM) injection? Did the reasons change over time?

3

When did you start injecting IM? How did you find out about it? Is IM injecting your primary route of administration? Was it necessary to adjust the dose?

4

How do you rate IM injection in general and when compared to other routes of administration?

5

Provide a description of the IM injection procedure. Where are you injecting? What do you look out for during IM injections?

6

Please describe the effect of IM DAM compared to other routes of administration you have used

7

Did you ever experience any complications in connection with IM injections? Which ones?

(8)

In case of no experiences with IM injections: Why did you refrain from ever injecting intramuscularly?