Antibiotics are not a cure for lupus. Lupus is an autoimmune disease that occurs when the body's immune system attacks its own tissues and organs. Antibiotics are used to treat bacterial infections, but they do not affect the underlying autoimmune process that causes lupus. However, antibiotics may be prescribed to treat secondary bacterial infections that can occur in cats with lupus. For example, cats with lupus may be more susceptible to skin and urinary tract infections due to their weakened immune system. Treating these infections with antibiotics can help to prevent further complications and improve the cat's overall health.