Insulin Glargine: A Long-Acting Insulin Analogue Insulin glargine, sold under the brand names Lantus and Basaglar among others, is a long-acting, basal insulin analogue used to treat diabetes mellitus. Insulin glargine was developed to provide enhanced glycemic control over 24 hours with just one injection per day. Compared to human insulin, insulin glargine has a slower time of onset, a...