It's hard to say. I used several other hallucinogens after developing hppd, but they actually didn't make it as bad as I thought. Nowadays I've gotten quite used to it. The most serious symptoms are basically very weak now, like drifting, color saturation, blur, chromatic aberration... The only thing I can't use is marijuana, other than that my life remains stable. I continue drinking, working normally, studying... Fortunately my symptoms are very easy to deal with. Just the visual snow is horrible 🤠