A new study has found that Aleve, a popular over-the-counter painkiller made by Bayer, could increase heart problems, and federal officials are warning patients not to exceed the recommended dose of two 200-milligram pills a day or continue therapy for more than 10 days without consulting a physician. It was the fourth big-selling pain medicine in recent months to be suspected of hurting the heart, and federal drug officials said that similar drugs, like Advil, might also increase heart risks. The study, sponsored by the National Institutes of Health, was intended to measure whether Aleve and Celebrex, made by Pfizer,...