NEOCILOR 5MG is likely a lozenge or throat tablet containing 5 milligrams of chlorhexidine hydrochloride or chlorhexidine diacetate. Chlorhexidine is an antiseptic and antimicrobial agent used to treat minor infections of the mouth and throat, such as sore throat, mouth ulcers, and gingivitis. It works by killing or inhibiting the growth of a wide range of bacteria and some viruses and fungi in the oral cavity. The lozenge formulation allows for slow release of the antiseptic as it dissolves in the mouth, providing prolonged local action.