Aspirin, ibuprofen and acetaminophen all treat pain — but they’re not the same. Dr. Sanjay Gupta explains how each medication works and which one is best for common issues like headaches, arthritis and toothaches. To read more about pain relief, check out Dr. Gupta’s new book, "It Doesn’t Have to Hurt: Your Smart Guide to a Pain-Free Life," at https://www.aarp.org/gupta. | AARP