I tried homeopathy and definitely felt something, although it could have just been placebo. If you think it could help and won't make your HPPD worse and are willing to take the chance then you should give it a shot. The homeopathic medicine I took was cannibis infused and I didn't experience any averse side effects. I don't think there's much risk but I also don't think you're gonna "cure" yourself. HPPD isn't really something that can be instantly reversed.