FENDRIX is a brand name for a hepatitis B vaccine specifically designed for adults with renal impairment, including those on hemodialysis. It is an adjuvanted vaccine, meaning it contains an additive that enhances the body's immune response to the vaccine, allowing for better protection against the hepatitis B virus. FENDRIX works by stimulating the body's immune system to produce antibodies against hepatitis B, providing immunity to individuals who are at a higher risk of exposure to the virus due to their medical condition. The vaccine is administered through a series of injections according to a schedule that ensures optimal protection.