Dequadin Sore Throat Lozenges are a treatment that works to provide relief for symptoms associated with a sore throat as well as mouth ulcers, tonsillitis, stomatitis, and oral thrush. The active ingredient in these lozenges is dequalinium. Dequalinium is an antiseptic that kills bacteria, yeasts, and fungi in the mouth. Dequadin contains Dequalination Chloride and is a broad-spectrum antibacterial and antifungal medicine. It is effective against Gram-positive and Gram-negative bacteria on Borrelia vincentii, Candida albicans, and a few species of Tricophyton. Dequadin is available in tablets, spray, and oral mucosal solution, depending on your needs.