Did LSD give you any long term cognitive impairment that you notice? Have you suffered from psychosis, depression, HPPD, memory issues, or long term disassociation? Have you had longterm headaches, anxiety, or trouble focusing due to LSD? In your case, were these issues due to a prolonged LSD use? Or are these issues from a single instance of very high dosage? Its clear that LSD is safe to have an occasional "therapeutic" dose. However, I know many of you think that getting very high (tripping) on LSD occasionally is actually fairly safe too.