This is a russian drug designed back in the 60's. It mimics gaba in its performance, however it has a few undesirable side effects.

Here is an article explaining https://en.wikipedia.org/wiki/phenibut.

Since your body seems somewhat responsive to it, I am thinking you might have a mild gaba deficency. This common condition is easy to correct.

Gaba deficiency is a result of low concentrations of a bacterial strain called lactobacill rhamnoses.

The effects of gaba deficiency are anxiety and depression, you feel nervous all the time, you feel agitated, restless, can't sleep well at night, and your pain levels may be higher than normal since gaba helps to control pain levels.

Gaba brings on a soothing calming relaxing state where you feel comfortable and can fall asleep at night just fine.

Now gaba is not made by the human body, it is made for us by a particular stain of gut bacteria lactobacilli rhamnoses. They make it for us and we use it as a brain neurotransmitter.

To increase gaba function relieve anxiety and depression you must increase the gut bacteria which make it by taking correct probiotics which include this vital strain. Some types of yogurt have included lactobacilli rhamnoses but not all of them have it. Be sure to look for it on the label.

Who would have thought a few trillion bacteria can sure make life a little easier for us.

To jump start your program, let's say you find someone severely depressed with extreme anxiety etc then gaba can be taken as a supplement. It's readily available at nearly any health food store for cheap.

For best results always see a naturopathic doctor rather than simply treating yourself. Brain health depends on a multitude of nutrients working in harmony with each other. This is best guided by a naturopath experienced in complete holistic health.