Acebutolol (branded as Sectral) is a beta-blocker medication developed by A.H. Robins Company. Approved by the FDA, it is used primarily to treat high blood pressure (hypertension) and certain heart conditions such as arrhythmias (irregular heartbeats). Acebutolol works by blocking beta-adrenergic receptors in the heart, which reduces heart rate and blood pressure, and helps to stabilize heart rhythms. It can also be used to manage angina (chest pain) and is sometimes prescribed for anxiety or tremors. Common side effects include fatigue, dizziness, and gastrointestinal issues.