35 yo male.  12 years on methadone for migraine pain and chiari malformation.   Dose was around 120 to 150 mg per day.   2 years ago I developed rhabdomyolysis from 5 to 10 minutes of swimming. This occurred on 2 occasions resulting in temporary dialysis 1 of the times.  After ruling out genetic factors it was determined that methadone must be the cause.  Since then I have decreased my dose and am currently at 7 mg per day.  However each decrease is more difficult as it must be done in increments of 1 mg, making the percent decrease quite high.   I have some precise technical and medical questions about the procedure and I am well informed for someone with no medical background outside an unfinished premed undergrad. I have not had what you would call an addiction problem per se, as methadone is the only opiate I have used outside the occasional er visit over a decade ago.  I would take extra methadone when the pain is bad but never for enjoyment.  I have concerns surrounding covid, so I am not sure when I want to do the procedure, but I look forward to speaking with you to get a better idea of my options.