Description Sensodyne Rapid Action provides clinically proven rapid relief for sensitive teeth, it works in 60 seconds to relieve the discomfort of sensitivity when directly applied with a fingertip for one minute. That is because it is formulated to create a physical seal against sensitivity triggers. When used twice daily, it provides long-lasting protection from sensitivity.Active ingredients: Strontium Acetate, Sodium Fluoride How to use Adults and children 12 years of age and: Apply at least a 1-inch strip of product onto a soft bristle toothbrush. Brush teeth thoroughly for at least 1 minute twice a day (morning and evening), and not more than 3 times a day, or as recommended by a dentist or doctor. Make sure to brush all sensitive areas of the teeth. Minimize swallowing. Spit out after brushing.Children under 12 years: Consult a dentist or doctor. Precautions When using this product, if irritation occurs discontinue use.Stop use and ask a dentist if: Sensitivity persists or worsens. Sensitive teeth may indicate a serious problem that may need prompt care by a dentist. Pain/sensitivity still persists after 4 weeks of use.