Open and closed eye visuals, euphoria, change in perception of time
Side effects:
Nausea, vasoconstriction (mostly when combined with other vasoconstricting substances like LSD), unusual body sensations (facial flushing, chills, goosebumps, body energy), slight increase in heart rate, difficulty focusing
Health risks:
Mental: paranoia, fear, and panic. No other known specific physical risks at this time (but likely similar to LSD).
Important safety remarks:
1P-LSD is a substance with very little published about, with little known about its pharmacological or behavioral risks. The LD50 (median lethal dose) is not known.
Elaborate studies on this substance have not been performed, so long term effects are UNKNOWN!