US regulators approve first digital pill to track patients

WASHINGTON — U.S. regulators have approved the first drug with a sensor that alerts doctors when the medication has been taken, offering a new way of monitoring patients but also raising privacy concerns.The digital pill approved Monday combines two existing products: the former blockbuster psychiatric medication Abilify — long used to treat schizophrenia and bipolar disorder — with a sensor tracking system first approved in 2012.The technology is intended to help prevent dange