Thus, the in vitro test, using a fatty acid amide hydrolase (FAAH) inhibitor screening assay and 0.1–200 μM KPF concentration, showed that KPF was able to inhibit the enzyme FAAH responsible for regulating the duration of the action of the endocannabinoid molecule (eCB) system, which regulates complex circuits involved in the central role play in states similar to anxiety. This evidence concerns the gene FAAH and Anxiety.