FlexPro Pen is a prefilled disposable pen that administers insulin aspart subcutaneously to control blood sugar levels in patients with type 1 and type 2 diabetes. Insulin aspart mimics natural insulin in the body, transporting glucose to cells for energy. Patients should keep the pen at room temperature, inspect it for damage, dose it as directed and dispose of it safely. Insulin aspart should be taken before meals to lower blood sugar levels, avoid long-term complications and reduce the risk of hypoglycemia.