Salbutamol, Theophylline, and Chlorpheniramine Maleate are active ingredients found in various medications, and they serve different purposes:

1. Salbutamol: Salbutamol, also known as albuterol, is a bronchodilator. It is commonly used to relieve bronchospasm or narrowing of the airways in conditions like asthma and chronic obstructive pulmonary disease (COPD). Salbutamol helps relax the muscles in the airways, making it easier to breathe.
2. Theophylline: Theophylline is another bronchodilator. It is used to treat respiratory conditions such as asthma and COPD. Theophylline works by relaxing the smooth muscles in the airways and improving airflow to the lungs. It can also help reduce inflammation in the airways.
3. Chlorpheniramine Maleate: Chlorpheniramine maleate is an antihistamine that is often used to relieve allergy symptoms. It works by blocking the effects of histamine, a substance in the body that causes allergy symptoms like sneezing, runny nose, and itchy or watery eyes.

These ingredients can be found in various combination medications designed to address multiple aspects of respiratory conditions. The specific combination and formulation may vary by brand and product. It’s essential to use these medications as directed by a healthcare provider, as they can have potential side effects and interactions with other medications. Always consult with a healthcare professional for guidance on the appropriate use of medications containing these active ingredients.