So I have a list of supplements to help with (THIS IS NOT A CURE) the symptoms of HPPD, particularly dp/dr. These supplements worked for me but everyone is different I just want to be able to possibly help someone out. Skullcap, valerian root, alpha brain, hempseed oil, multivitamin, l tryptophan, cbd oil. This combination of supplements worked great for me to ease the anxiety on my road to recovery. The only way you can recover is through time and willpower. I also suggest exercising, eating as healthy as possible, remaining sober, talking to a therapist and trying out cognitive behavioral therapy. I hope this it helps someone else out as it has seemed to greatly reduce all of my symptoms, I am not yet cured but I am confident I will be one day.