Insulin Lantus Solostar 100 IU July 9, 2017 1069 × 396 Insulin Lantus Solostar 100 IU Insulin Lantus Solostar 100 IU LantusĀ® is a long-acting insulin used to treat adults with type 2 diabetes and adults and pediatric patients (children 6 years and older) with type 1 diabetes for the control of high blood sugar. Do not use LantusĀ® to treat diabetic ketoacidosis.