Which drug is indicated for the treatment of insulin-dependent diabetes?

Lantus is a long-acting insulin that is specifically indicated for the treatment of insulin-dependent diabetes, also known as Type 1 diabetes. In this condition, the pancreas produces little to no insulin, necessitating the administration of insulin as a medication to manage blood glucose levels effectively. Lantus helps to provide a steady level of insulin throughout the day, which mimics the natural release of insulin in individuals without diabetes.

The other options listed do not address insulin-dependent diabetes. Toprol XL is a beta-blocker used primarily for hypertension and certain heart conditions, Seroquel is an atypical antipsychotic used for mental health disorders, and Nexium is a proton pump inhibitor used to treat gastroesophageal reflux disease (GERD) and other gastrointestinal issues. Thus, these drugs are not suitable for managing insulin-dependent diabetes, making Lantus the appropriate choice for this condition.