Brush teeth and clean interdentally. Thoroughly chew one tablet and then rinse mouth. You may need to rinse out a few times to remove the excess dye before checking the plaque staining. Do not swallow the tablet. Examine the teeth and gumline. Residual red stain indicates newer plaque and blue stain older plaque that has been missed by a previous brushing.
Children under 12 years should be supervised by an adult.
Caution: Stains! Avoid contact with clothes and furnishings.