I don't think this is ever going away in my case. Of course this is just me, I'm not saying it won't happen to others. Seems like a permenat disinhibition in the brain. Good news: I'm rarely bothered by it anymore. But there was a flare up today which is why I thought about coming here. It's amazing how sensitive the brain is to chems with HPPD. All I took was a nutritional supp for recovery that was L-glutamine and taurine. Woke up in pastel/cartoon colored world. That's okay though, my HPPD symtoms always get better after these temporary flare-ups. Never have gotten worse overall.
I think the thing that helped me most was dealing with Depersonalization and Derealization. In the first few years I thought DP/DR and HPPD were a single condition. They seem connected, yes, but I was able to greatly reduce the DP/DR. Once this happens, and I no longer felt like I was looking at the world through a bubble, the HPPD symtoms became less noticeable and more in the background. So if I could give any advice , it would be to go after the DP/DR. You may not even realize that this is what is giving you the most problem. I didn't... just thought it was all HPPD.
How to deal with DP/DR... people have a lot of different suggestions. Obviously avoiding drugs/alcohol...reducing anxiety, specificly , OCD-type. Once I reduced this, the DP/DR reduced. And an SSRI sertraline I took reduced it alot. Unfortunately , I avoided SSRIs for years because people said they usually made symptoms worse. It did, in the beginning. But I decided to stick with it and after several months my DP/DR was greatly reduced and so was my obsession. So I wouldn't discount this type of med.
Good luck to you all...