Valerenic acid can inhibit an enzyme that can destroy GABA. » It has been observed that the effects of this herb on the brain are somewhat similar to the effects of benzodiazepines, which are sedative drugs used for the treatment of depression and anxiety. These drugs activate the GABA receptors present in the brain. Drugs like Xanax (alprazolam) and Valium (Test X180 Alpha ) also increase the amount of GABA in the brain. The Effectiveness of Valerian in Reducing Anxiety » Though Valerian and its roots have been used for promoting sleep and reducing anxiety for a long time, the results of the scientific studies carried out to evaluate the effectiveness of this herb as a sleep aid is largely conflicting in nature. Some studies comparing this herb with a placebo have found that it is more effective than placebo in treating insomnia, while others have not found any difference between the two. » Some studies have found that valerian helps people fall asleep faster, besides improving the quality of sleep. The main advantage of this herbal medicine over the prescription medications used for insomnia, is that it usually does not produce morning 'grogginess' and 'sleep hangover'. Moreover, it is non-addictive in nature, and it usually does not cause dependence. » 

http://www.healthfulnutritions.com/test-x180-alpha