Across 470 first-hand reports, people mentioned a side effect 30 times (about 6 per 100 reports). The most common: drowsiness, vivid dreams, fatigue. User reports show what people notice — they can't tell you whether GABA is safe for you.
“I take 1.5mgs with 1500mg GABA-A Acid I have insane dreams every night and sleep like a baby.”
“I also take one GABA capsule an hour before I sleep and it doesn’t really seem to do much.”
“I've started taking 1000mg GABA 2 weeks ago, and my anxiety levels decreased a lot, no more out of nowhere public anxiety shakiness.”
“Gaba is wicked I take 1.5-2 gs before bed every night and have the best sleep.”
“I supplemented with the ultimate adrenaline and cortisol nuke of a nootropic. GABA/melatonin...I noticed that the yohimbe suddenly started working SIGNIFICANTLY LESS.”
“I took it for the same reason and it didn't do shit for me.”
Conclusion: In respect to animal models of adult vitamin D deficiency, such exposures produce subtle neurochemical alterations and effects on cognition but do not appear to produce behavioral phenotypes of relevance to schizophrenia. We conclude, the hypothesis that vitamin D deficiency during early life may increase the risk of schizophrenia remains plausible and warrants ongoing research.
Conclusion: While the rate of adverse effects was low in all studies, it was found to increase as dosages increased. Results support that pregabalin has a role in decreasing postoperative pain intensity and supplemental opiate use; however, the optimal dose or dosing regimen is not yet well understood.