I guess it’s a question for all receptors. I’ve heard the term “receptor up/down regulation” but not entirely sure what it means. Can you do permanent damage to your receptors to the point where I won’t even be able to enjoy a Norco or Oxy 10mg even after a year of total sobriety?
One very important thing to take into account here is the brains amazing property reffered to as neuroplasticity. There is some evidence that shows that with time our brains can heal themselves from most types of damage. This could mean that even though our receptors have been substantially reduced through down regulation. New receptors can always form and even get back to pre-addiction levels given enough time. Alternatively there’s the whole “neurons that fire together wire together” thing. This is most likely the explanation for why people who were once long term addicts that have entered into long term sobriety are able to use for just a few days and be thrown back into withdrawals. As opposed to people who are opiate naive using for up to two weeks in a row and experiencing little to no withdrawals. Us addicts already have the pathways for addiction set up and lurking in the recedes of our gray matter.