Sensodyne Rapid Action - Clinically proven action in just 60 seconds* - Long-lasting protection** Sensodyne Rapid Action is clinically proven to relieve sensitivity pain in just 60 seconds.* Its unique formula quickly creates a barrier over the sensitive areas of your teeth. It provides fast action and builds ongoing protection with every brush. It also whitens enamel and prevents staining. For rapid action and long-lasting protection, try Sensodyne Rapid Action.