This is a link to my post about a big recent comparison between amitriptyline, pregabalin (aka pre gabs ;-P), duloxetine and milnacipran. No word lost about gabapentin, so I'll now check for studies comparing it with pregabalin, since that was developed as an improvement of gabapentin...
Now I'm mind-blown : It's not possible to compare pregabalin to its precursor gabapentin, as there is NO real evidence for gabapentin helping fibromyalgia at all
I always thought gabapentin never got an FDA-approval just because pregabalin was later, but turns out gabapentin has no evidence for FM, but has been hyped by the industry, and unknowing docs are now frantically = wrongly using it even more all the same, as an alternative to opioids - that's what several recent reviews are saying.
Only one (much earlier) study (Lloyd et al 2012, 682 patients) said:
"At 1 year, pregabalin was cost saving and
more effective than placebo, duloxetine, tramadol, milnacipran,
and gabapentin. Compared with amitriptyline, pregabalin was not cost-effective at both dosages".
If anyone's ever heard of mirogabalin as next in line, but "in infancy": first results 2019/2020 are disappointing.