Hey psylepsy,
sounds like it's high time for you to quit opioids for good. I wish you all the strength in the world on this path!
As you may or may not know, giving medical advice goes against the dmt-nexus
attitude, so please, talk to a doctor, and make them understand that you don't want another opioid to control withdrawal from the previous ones, if avoidable.
I am not medically educated in any way, so what follows may be wrong on many levels.
I'm not aware of any serious physiological problems associated with the use of LSD. There are no addiction mechanisms as with opioids, no physical withdrawal.
When used frequently, it can be destabilizing psychologically, alienating you from the world, your loved ones and yourself. How often one can safely trip is highly individual.
What dosages do you intend to take, how often, and for how long?
How long does the relief from your symptoms last after you take it?
How long does withdrawal last from those meds?
Do you need the LSD only to fight the addiction, or do you have some condition(s) that made you take opioids, that you want to continue treating with LSD after withdrawal is done?