I am not sure if they do honestly. I have horrible anxiety and in 2013 I was offered to try Zoloft. Because I am highly sensitive, intuitive and I read people all around the world (on the side), I was worried it would negatively impact my abilities.
I started Zoloft in fall 2013 and it is my saving grace. Calms me down and having it help with anxiety makes it easier for me to get in the mindset to do readings and the like. Because I am calmer, my spirit self is happier.
Keeping in mind the anxiety I have on a scale of 1–10 is probably a 50. And the Zoloft got me down to a manageable 8. I do have instances of extreme anxiety still but it is a lot more manageable now.