Warnings:
Before taking GABA, tell your doctor if you are pregnant or breastfeeding
Do not take GABA if you have any of the following conditions: Prader-Willi Syndrome (1), Angelman Syndrome (1), encephalopathy (brain disease including dementia) due to liver disease (2),
or behavior disorders (such as attention deficit hyperactivity disorder) (3)
Side Effects: Stop taking your medicine right away and talk to your doctor if you have any of the following side effects. Your medicine may be causing these symptoms which may mean you are allergic to it.
Breathing problems or tightness in your throat or chest
Chest pain
Skin hives, rash, or itchy or swollen skin
Other Possible Side Effects: You may have the following side effects, but this medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.
Visual field defects have been reported with use of the synthetic form of GABA (available by prescription only) (4)
Flushing, increased mood, anxiety, and increases in blood pressure and heart rate have been documented in animals given GABA (5)
Got it off google by way of this here website!
http://www.genesishealth.com/micromedex/altmedgen/ame0359.aspx