Otorex Ear Drops 10ml contains ingredients that aid in the treatment of ear pain. Benzocaine is a local anesthetic. As a result, it works by blocking pain signals from the nerves to the brain, which decreases the sensation of pain. Chlorbutol is a preservative. Paradichlorobenzene is an ear wax softener that dissolves the ear wax while exerting antibacterial and antifungal actions. Turpentine Oil is a lubricant.