Gabapentin
"For 5 years I had severe constant pain from arthritis around my right collar bone pressing nerves. Along that journey, I had a nerve ablation done on my C3-C4-C5 vertebrae that helped a pinched nerve there.   Finally found a pain specialist who put me on Gabapentin   Nortriptyline (usually for depression). Gabapentin alone did nothing.  He convinced me the 25mg Nortriptyline is a tiny dose but works great with the Gabapentin.  He was right.  Immediate relieve.  After surprise surgery for a perforated sm intestine, had to hold off all Rx's while in the hospital. Then started lightening bolts of Siatica nerve pain down right leg. EGAD.  Back home, restarted Gaba and Nortrip - Siatica all better.  Wow!"