my grandmother had one of these and she shot herself in the tummy with it but it depends on what your blood sugar is as to how much you are to ingect.
Normally your care provider would have provided you with instructions. Didn't instructional paperwork accompany the pen? Contact your care provider for the proper amount [units] designated for you. Then Google search "how to use novolog flex pen" [w/o the " " [quotes]], scroll down and click the link to [PDF] NovoLog Flex Pen. You'll need a .pdf reader to read it. If you don't have one, go to Adobe and download and install the free pdf file reader.