This document discusses Orbas, an olmesartan medication for treating hypertension. It is available in 20 mg and 40 mg tablets, with dosing of 20 mg once daily or up to 40 mg, or for children 10 mg for weight under 35 kg and 20 mg for weight over 35 kg. Olmesartan effectively reduces blood pressure in adults and children aged 6 years and older. The document also discusses endothelial cells, which line blood vessels and control blood pressure, and how endothelial dysfunction can result from and contribute to diseases like hypertension.