We're glad you reached out about this, and hope it helps to know, like all mouthwash products that effectively fight plaque and gingivitis, Crest Pro-Health products contain an active ingredient that is recognized as safe and effective. These anti-plaque/anti-gingivitis mouth rinses can contribute to temporary, surface-level brown tooth discoloration. This tooth discoloration is actually a sign your mouthwash is working. After it kills germs in your mouth, the dead germs can collect on the tooth surface and create the appearance of a brown stain. Brown discoloration is reversible and preventable. To help aid in the removal of tooth surface stain, we recommend a tartar-control/whitening toothpaste, a power toothbrush, floss, and regular dental visits. When you have a minute, please reach out to us at (800) 285-9139, so we can find a mouthwash that meets your needs.

We're sorry you're feeling disappointed. We do put a lot of thought into creating features that we think you'll like, though we do understand that preferences can vary from person to person. We'll be sure to share your feedback with our team. We'd also be happy to learn more about your experience, so please give us a call at (800) 285-9139 when you're able.

We're sorry this has been your experience, Fred, and we hope you're feeling better. Since safety is our top priority, we can assure you that our products are thoroughly evaluated to be safe when used as directed. While all of our products are safe and effective, some people may not tolerate a particular formulation. If irritation persists or becomes uncomfortable, discontinue use and consult with your dentist. We'll be sure to pass your comments along, and we'd also like to gather some more details for our Safety Team. When you have a chance, please give us a call at (800) 285-9139.