One tablet contains 20 milligrams of benzalkonium chloride, as well as anhydrous lactose (lactopress), microcrystalline cellulose, polyplasdone IKS EL-10 (crospovidone), plastidone ES-630 (copovidone), macrogol (polyethylene glycol 4000), aerosil (silicon dioxide colloid), magnesium stearate.