Semax is a medication that has been used in Russia to treat generalized anxiety disorder (GAD) and improve cognitive function. It is a type of peptide, a small protein-like molecule, that works by affecting certain chemical processes in the brain to reduce anxiety and enhance memory and learning abilities. Clinical trials have shown Semax to be effective and safe, with no major side effects reported. Semax is believed to increase the levels of certain brain-growth compounds, called neurotrophic factors, and improve the body's immune response to infections. Overall, Semax is considered a promising option for the treatment of anxiety and improvement of cognitive function.