This is a supplement for those seeking to avoid the prescription benzodiazepines (tradenames Ativan, Klonopin, Valium, Halcion, etc.), which are intended to be taken only for a short period (2-3 weeks) and if taken longer can develop addiction and lead to severe withdrawal symptoms. (Other side effects of these prescription drugs are dulled awarenesss, diminished brain function, leading in some cases to accidents.)
Theanine is an amino acid found in green tea, and has an excellent safety profile. It acts as a relaxing agent by increasing levels of various brain chemicals including GABA (gamma amino butyric acid), a neurotransmitter with soothing, relaxant effects. This Source Naturals formula also includes GABA itself.
For more on using theanine and GABA as a substitue for benzodiazepines, see other entries in this blog, especially regarding the recommendations of Dr. Hyla Cass, a physician who specializes in nutritional supplement alternatives to prescription medications.
Note: Theanine Serene contains wheat/gluten. Do not use if pregnant or if using other MAO or serotonin-reuptake inhibitors.