Although most people tolerate Lantus® (insulin glargine) well, side effects are possible. Some of the most common Lantus side effects include low blood sugar and reactions at the injection site. In most cases, side effects tend to be minor and are usually easy to treat. However, you should notify your healthcare provider right away if you develop more serious side effects of Lantus, such as seizures, difficulty breathing, or difficulty speaking.
(To read more, click Lantus Side Effects. This article takes an in-depth look at other possible side effects of Lantus, including the side effects that require medical attention. You can also click any of the links in the box to the right for specific information.)