Osha is an antibacterial and anti-inflammatory. It is ideal for viral infections of the sinuses, throat, and upper and lower respiratory systems. It helps bring up respiratory secretions and relaxes smooth muscle, making it beneficial for coughs and asthmatic breathing difficulties. Osha induces sweating and helps eliminate toxins through the pores of the skin. Benefits of osha for specific health conditions include the following: Arthritis and carpal tunnel syndrome. Osha is a traditional remedy in Native American medicine and home remedies of the American West for providing long-term relief of inflammation. Bronchitis, colds, influenza, and sinusitis. One of the active constituents of osha is Z-ligustilide, which acts gently against bacterial and yeast infections. In the minute quantities provided by the herb, this chemical stops the multiplication of bacteria and yeast cells while relaxing the muscles lining the respiratory passages. It is very useful for stubborn respiratory conditions and viruses that linger.