Fenspiride is a pharmaceutical substance with the CAS number 5053-06-5. It is an anti-inflammatory and bronchodilator agent used in the treatment of respiratory conditions such as asthma, chronic bronchitis, and chronic obstructive pulmonary disease (COPD). Fenspiride acts by reducing inflammation in the airways, improving the flow of air, and relieving symptoms associated with respiratory disorders. It is available in oral tablet form and is commonly prescribed by healthcare professionals to manage and alleviate respiratory symptoms in patients.