For years I endured a tooth that was slightly sensitive to cool temperature, but when I started getting generalized tooth pain that two doctors couldn't pinpoint it was time for sensitive toothpaste. Arm & Hammer uses the same active ingredient in the same concentration as other sensitive toothpastes, but Arm & Hammer tastes better, and yes, it works perfectly. I didn't even realize how much pain I was tolerating until it all went away! Interestingly, the box says to consult a dentist if you want to use this for more than two weeks. I did, and she explained that the product works so well that it can mask the symptoms of very serious dental infections. I got permission to use A&H indefinitely, as long as I continue to get my regular semi-annual checkups.