Almost 50 years later, Patrick Kroupa and Hattie Wells released the first treatment protocol for concomitant administration of ibogaine with opioids in human subjects, indicating that ibogaine reduced tolerance to opioid drugs.
Gotovo 50 godina kasnije, Patrick Kroupa i Hattie Wells izdali su prvi protokol tretmana za praćenje interakcije ibogaina i opioida u čovjeka gdje se indicira da ibogain smanjuje toleranciju na opioidne droge.