tiotropium + fenoterol

Tiotropium + fenoterol is a combination of two bronchodilator drugs intended for the treatment of respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma. Tiotropium is a long-acting muscarinic antagonist (LAMA) that works by blocking muscarinic acetylcholine receptor M3 in airway smooth muscle, leading to bronchodilation and improved airflow[1][2][4]. Fenoterol is a short-acting beta-2 adrenergic agonist (SABA) that stimulates beta-2 adrenergic receptor in bronchial smooth muscle, resulting in rapid relaxation of the airways and relief from acute bronchospasm. The combination aims to provide both sustained bronchodilation from tiotropium and rapid symptom relief from fenoterol.