Here is what I found in my research:
"Talk with your caregiver about how much GABA you should take. The amount depends on the strength of the medicine and the reason you are taking GABA. If you are using this medicine without instructions from your caregiver, follow the directions on the medicine bottle. Do not take more medicine or take it more often than the directions tell you to."
- 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)
Normal daily doses of GABA in single-ingredient form, range from 250 mg to 1000 mg. In combination therapies that include Valerian, Hyperforin, Kava, Bacopa and vitamin B cofactors like B6 and B3, a daily intake of 10 mg to 100 mg is sufficient.
Hope that helped answer your question!