DaTSCAN is supplied as a single, colourless, 10 ml glass vial containing either: • 185 MBq (Megabecquerel – the unit in which radioactivity is measured) of the active substance ioflupane (123I) in 2.5 ml of a sterile solution for intravenous injection, or • 370 MBq of ioflupane (123I) in 5.0 ml of a sterile solution for intravenous injection.