I think what you're referring to is that some medications are habit-forming and that they try to get you onto other habit-forming....
You also mentioned that when prison officials are looking for drugs, etc., it causes mistrust. I think you said that trust levels are low on both sides.
You have to realize that this is a public hearing and that people outside are going to be asking, isn't it a natural and a needed thing that our prison officials are looking for illegal drugs being brought into our prisons? And if that causes low morale, maybe the prisoner has within himself or herself an ability to change that trust level by adhering to the programs that are in prison and appreciating the fact that we're trying to keep illegal drugs outside of our prisons.
If you use your argument to the converse, we'd have really good trust levels if they didn't look for drugs at all.