Amyvid is an imaging agent used in adults who have thinking or memory problems and who are being assessed for Alzheimer's Disease (AD) or some other causes of these symptoms. Amyvid is given by injection and it requires a prescription. Amyvid is used with a machine called a positron emission tomography (PET) scanner. The scan shows whether a person's brain has an abnormal buildup of a protein called beta-amyloid. When beta-amyloid proteins build up and clump together, they form lumps in the brain called plaques.