Xamoterol S Isomer is a medicinal compound used primarily in the treatment of heart failure. However, there are a few other synonymous terms that can be used interchangeably for this drug. One such synonym is (S)-xamoterol, which refers to the specific isomer of xamoterol that is used medicinally. Additionally, it can also be referred to as Selective S-Adrenergic Agonist, as it selectively stimulates the S-adrenergic receptors in the body. Lastly, it is sometimes referred to as a β1-selective agonist due to its specific effect on the β1-adrenergic receptors. These synonymous terms all describe the same medication, Xamoterol S Isomer, and are used in medical literature and discussions.