hyper intuition as a 'drug'

[zenmaster]

People often think repetitive negative thoughts, which in turn stimulate the brain into creating specific chemicals via the glands

Yes, stimulate and/or suppress.

, which in turn effect the body (and thoughts) negatively.

It's often due to too much ignored catalyst, but there are also physiological causes. I'd like to think that these psychological difficulties are unique learning opportunities. You might not have been able to see the 'world' or 'self' in quite the same way without the specific 'negative' bias that the condition induces, and therefore not been able to learn something particularly appropriate about the 'logos'.

They then believe that the feeling is natural

Yes. All ignored catalyst is believed to be 'natural'. As we know in 3D, the ego automatically habituates (and then desensitizes or filters-out) to common patterns being indicated by any of our 5 senses, plus feeling/emotional impressions.