I've played around with this chemical for the last week or two and have come to conclude that its virtually useless, at least recreationally for me. I have an opiate tolerance, however its not that enormous by any stretch of the imagination, but even its humble size has rendered this chemical not even worth experimenting with farther. Doses above 300 mg oral and 150 mg smoked have resulted in lackluster experiences. If this chemical could produce the type of high I was looking for, that which many other opiates provide me with sufficiently, I expect those results would have been achieved based on the corresponding peripheral side effects noted. This is just not the opiate for my receptors. Shame, because I had hopes for this one. Though I will say other opiates were definitely potentiated by it and it made the benzos I'm on daily feel more sedating. I quite enjoyed MT-45 and acetyl-fentantyl with opiate tolerances, and without an opiate tolerance I'd recommend kratom before this. Hope others find chemical more useful the I have.