For rapid action and long lasting protection, combined with a whitening benefit, try Sensodyne Rapid Action with Whitening. How to Use: 1. Brush twice a day and not more than three times. Minimise swallowing and spit out. Ingredients: Stannous Fluoride 0.454% w/w Sodium Fluoride 0.0721% w/w (1450ppm Fluoride).