 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] am Dental: Temporary staining of the teeth may occur. Brushing may control these stains, which can be removed by your dental professional. If this effect lasts or gets worse, tell your dentist or doctor promptly. Tell your dentist/doctor right away if you notice any changes in the color or appearance of your teeth. These effects may be a result of too much fluoride. If your doctor or dentist has directed you to use this medication, remember that your doctor or dentist has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor </s>