> Also can you please link me to a study that shows a causal link between names of apps, and an increase in usage in that drug the app is named after?

How about this one? Considering that the app also has a picture of a pill as a logo, I think it would be ill-advised for former addicts to have the app installed. https://link.springer.com/article/10.1007/s00213-004-1828-4

Also have this blog post from psychology today https://www.psychologytoday.com/us/blog/all-about-addiction/...