Which condition is treated with antidiabetics?

Antidiabetics are specifically designed to manage blood glucose levels in individuals diagnosed with diabetes. This group of medications works by targeting the underlying issues in glucose metabolism that arise in diabetes. For instance, some antidiabetic drugs help the body produce more insulin, while others improve insulin sensitivity or reduce the amount of glucose released by the liver.

In the context of the other options, hypertension, asthma, and heart disease are unrelated conditions that require different types of medications. Hypertension is managed with antihypertensive medications, asthma is treated with bronchodilators or anti-inflammatory drugs like corticosteroids, and heart disease may involve a range of treatments including statins, beta-blockers, and other cardiovascular medications. Therefore, the correct answer focuses specifically on diabetes, which is the condition directly addressed by antidiabetic treatments.