Isoprinosine is primarily used as an immunostimulant to enhance the body's immune response. It is commonly prescribed to treat viral infections, including influenza, herpes, and measles, by boosting the immune system's ability to combat these pathogens. Additionally, it is utilized in managing subacute sclerosing panencephalitis (SSPE), a rare and progressive neurological disorder linked to measles. Isoprinosine is also explored in the treatment of chronic fatigue syndrome and certain autoimmune conditions due to its ability to modulate immune function. Its application extends to improving symptoms in patients with compromised immune systems, aiding in faster recovery and reducing the severity of infections.