FDA to Warn Doctors About Problems with Imaging AgentsFDA to Warn Doctors About Problems with Imaging Agents

FDA said it will alert doctors to problems associated with two imaging agents that are injected into patients' veins before their hearts are viewed via echocardiography, an ultrasound procedure, Reuters reports. The agency is investigating reports that GE's Optison and Bristol-Myers Squibb's Definity are associated with deaths and severe cardiopulmonary reactions. It is possible the products will be required to carry a "black box" warning, the strongest kind.