Actually pregabalin is an anti-epileptic. Pregabalin and gabapentin withdrawal can cause seizures.
There are reports that both gabapentin and pregabalin raise levels of gaba acutely after administration. Gabapentin and pregabalin however, do not act at the GABAA or GABAB receptor with any appreciable effect.
A 34-year-old male with lumbar disc disease and surgery was placed on gabapentin daily for chronic back pain. He remained on a steady dose of 8000 mg/day for 9 months, almost doubled what is considered therapeutic. He ran out of medication, was unable to refill his prescription for 2 days and...
pubmed.ncbi.nlm.nih.gov
And both gabaergic and gabanergic are correct with respect to drugs that interact with the GABA system. There is an N.