Orajel Advanced Tooth Desensitizer is an oral medication designed to treat sensitive teeth for up to 3 months with one application, states Danny's Pharmacy. Its ingredients are benzalkonium chloride, butylated hydroxytoluene, 2-hydroxyethyl methacrylate, purified water and sodium fluoride. The product claims to relieve sensitivity in minutes after a 10-second application.
The product instructions caution patients not to use Orajel Advanced Tooth Desensitizer to treat a toothache or any other source of mouth pain, including cuts, canker sores, irritated gums, infections and abscesses, notes Danny's Pharmacy. The instructions state that patients may experience redness, burning or irritation on contact with the lips, cheeks, gums or other mouth tissue. As of 2015, at least one person has reported experiencing severe swelling of the lips, mouth and gums that required medical attention after using the product according to the instructions, reports the U.S. Food and Drug Administration.