2 options for ya solid ones.
1 do you take your gaba dose spaced out ? ( passed 900mg your body absorbs less and less) example, today i took 5500mg worth pentin, 900 initial dose, 300 every15-30min and it works MUCH better than a single high dose of it.
2. Switch to pregabalin, pentin has a low bio of 30% absorbed via gastrointestinal tract. Meanwhile Pregabalin(lyrica) is 100% readily absorbed and takes an hr to take effect.
I take both together often
It may not be the other drug, pentins got a way of having two waves i notice, first the small intestine where you feel the effects at different levels the small intestine (first) being lesser in effect then when it hits the large in 1-2hrs the drunkish state takes full hold.
So your solution may be be to take a tolerance break ( you will wd so youd need to still take some during the day about 300-600mg)
Or switch to my lovely pregabalin however it does not have the same effect profile as pentin such as a disabling drunkish state