In 2009, the Centers for Disease Control and Prevention became aware that some health care professionals and hospitals were improperly using insulin pens and sharing them among patients. The Food and Drug Administration even issued an alert that insulin pens are meant for single-patient use. 

This is why it's important for everyone – both individuals and health care professionals – to know the proper use of insulin pens. 

How to Use an Insulin Pen in 7 Simple Steps 

We've outlined seven simple steps to make sure you get it right. If you're just getting familiar with the insulin pen, it's always recommended that you have a health care professional or pharmacist demonstrate in person first.