Alleviate Metallic, Bitter, & Unusual Tastes - MetaQil is an innovative oral rinse made for adults that cools the mouth to provide instant relief and comfort for altered or metallic taste symptoms caused by chemotherapy, radiation, COVID-19, medication, or GERD. Formulated with natural sweetener and essential oils. Leverage the power of self-care by improving the wellness of your oral health with MetaQil oral rinse mouthwash.