dentogelPharmacological action. Dentogel is an antiseptic. This medication is a quaternary ammonium compound, belongs to the cationic surfactant. Dentogel (Benzalkonium Chloride)Dentogel is a combination of cho salicylate, lidocaine, and benzalkonium chloride. It is used to relieve pain, swelling, redness, and discomfort associated with mouth ulcers or sores. Learn about its uses, side