Medications for ANCA-associated vasculitis work by targeting the immune system. Common classes include corticosteroids and biologics. Corticosteroids like prednisone (Deltasone) are usually taken as oral pills. Biologics like rituximab (Rituxan) are typically given as injections. Another option is avacopan (Tavneos), which is taken orally. These treatments help control inflammation and prevent further damage to your organs.