Seers and Drugs

I had lunch a few weeks ago with a Seer, and we discussed seers and drugs. His gifting is different than some of the others I talk about.He doesn't see spirits, but he can read the spirit of a person, as in detecting their aura. He can see people's destinies, and prophetically say it. He can tell a person's character or inclinations based on reading their aura.He says he doesn't know how he can, but he just can, and that's been the case for as long as he can remember.What's interesting is, he has chosen to align himself with Jesus, and so he uses this gift to speak life into people.Something that stood out to me was this: at one point, he took psychotropic medication to deal with his depression. Once he took the drugs, his seeing stopped.  He hated it. Plus, the drugs only dealt with the symptoms of his depression, and not the root cause. Ultimately, he gave up the drugs and allowed Jesus to heal him of the root of his depression (and the symptoms left). More interestingly to me, his seeing gift returned.Just what impact on brain chemistry do drugs have? Do they impact the pineal gland? Is that the tool that the brain uses to detect the spirit world?