Which of the following is long acting sympatho mimetics used in Bronchial asthma
**Core Concept**
The question is testing the student's knowledge of long-acting sympathomimetics used in the management of bronchial asthma. Long-acting sympathomimetics are a class of medications that activate the beta-2 adrenergic receptors in the lungs, causing bronchodilation and relaxation of airway smooth muscles.
**Why the Correct Answer is Right**
The correct answer is a type of long-acting beta-2 agonist (LABA) that is commonly used in the treatment of bronchial asthma. LABAs work by activating the beta-2 adrenergic receptors in the lungs, which leads to the relaxation of airway smooth muscles and bronchodilation. This results in improved lung function and reduced symptoms of bronchial asthma.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a type of short-acting beta-2 agonist (SABA), which is used as a rescue medication for acute asthma symptoms, not a long-acting sympathomimetic.
**Option B:** This option is incorrect because it is an inhaled corticosteroid (ICS), which is used as a maintenance medication to reduce inflammation in the airways, not a long-acting sympathomimetic.
**Option C:** This option is incorrect because it is an anticholinergic medication, which works by blocking the action of acetylcholine on muscarinic receptors in the airways, not by activating beta-2 adrenergic receptors.
**Clinical Pearl / High-Yield Fact**
When treating bronchial asthma, it is essential to use a combination of medications, including inhaled corticosteroids, long-acting beta-2 agonists, and short-acting beta-2 agonists, to achieve optimal control of symptoms and prevent exacerbations.
**Correct Answer:** C. Salmeterol is a long-acting beta-2 agonist used in the treatment of bronchial asthma.