Can opiates cause memory loss?
Yes. Long-term addiction can cause memory loss. Google “memory loss” and “opiates.” But opiates can also cause anterograde amnesia or temporary short-term memory loss. If one ingests to much of an opiate the can enter a semi-conscious state where they are awake but incomprehensible. At this point they will not for memories. This effect is temporary but the user will never recover the memories lost while he was under the influence of said opiate.