.avif)
The non-psychoactive iso-LSD is produced during the manufacture of LSD and indicates that the LSD was not manufactured or purified properly. Presumably, long-term storage can also favor the conversion of LSD to iso-LSD.
Some users report that iso-LSD inhibits and/or otherwise influences the effects of LSD. However, there is as yet no scientific evidence to support this hypothesis. Whether iso-LSD can produce non-psychoactive but otherwise pharmacologically relevant effects has not been conclusively clarified. Especially in higher doses, pharmacologically significant effects are conceivable.