Lawsuits Are Being Filed Concerning Fatal Allergic Reactions Link to Ultrasound Contrast Affinity Containing Polyethylene Glycol (PEG) FDA - The United States Food and Drug Administration has announced a new warning regarding Difinity and Difinity RT which contain polyethylene glycol (PEG) that has cause fatal allergic … [Read more...] about Ultrasound Contrast Definity Anaphylaxis Wrongful Death Lawsuit