I remember gotu giving me a anxiolytic feeling unigue to other stuff that benzo's couldnt give, i allways liked the stuff.Looks like Gotu Kola does have GABAb-agonism:
This study is consistent with asiatic acid having an effect on AChE, a selective GABA(B) receptor agonist and no sedative effect on locomotor.
http://www.ncbi.nlm....pubmed/22112723
Ashwangandha also agonizes GABAb along with GABAa.., well it's actually considered to have "GABA mimetic" mechanism of action, but the GABAb affinity is definitely there as it works for Phenibut withdrawals.
I've been consuming full-spectrum Ashwagandha powder couple teaspoons a day after I run out of an extract. I feel it's smoother but the good qualities are still there. No rebounds or side effects.
So I still stand behind Ashwagandha + Gotu Kola for effective herbal anxiety treatment with minimal side effects. Throw some Rhodiola in there and it's pretty awesome.
Chinese herbalist allways threw 100 things togheter, seems what you have to do with those herbs to get pharm like effects.