This combination is commonly used in a liquid formulation, such as a cough syrup, to treat symptoms of the common cold, allergies, or other respiratory illnesses. Here are the uses of each component in this specific formulation:

Dextromethorphan Hydrobromide (10mg per 5ml): This is a cough suppressant that acts on the brain to reduce the urge to cough. It is used to relieve dry, irritating coughs that do not produce mucus.

Chlorpheniramine Maleate (2mg per 5ml): This is an antihistamine that reduces the effects of natural histamine in the body. It helps to relieve allergy symptoms such as runny nose, sneezing, and watery eyes.

Flavoured Syrupy Base (q.s): This is included to improve the taste of the medication, making it more palatable, especially for children.

Uses of the Combination:

Cough Suppression: Dextromethorphan helps to suppress non-productive, dry coughs associated with colds, flu, or other respiratory conditions.

Relief of Allergy Symptoms: Chlorpheniramine provides relief from symptoms such as runny nose, sneezing, itching of the nose or throat, and itchy, watery eyes caused by allergies or the common cold.

Common Cold and Flu Symptoms: This combination is often used to alleviate multiple symptoms of the common cold and flu, including coughing, sneezing, and nasal congestion.

Respiratory Tract Infections: Helps to manage symptoms of upper respiratory tract infections by providing cough relief and reducing allergic reactions.

How It Works:

Dextromethorphan Hydrobromide: Acts on the cough center in the brain to suppress the cough reflex, providing relief from dry, non-productive coughs.

Chlorpheniramine Maleate: Blocks histamine receptors, reducing the effects of histamine in the body. This decreases allergy symptoms such as sneezing, runny nose, and itchy eyes.

This combination is particularly useful for managing the symptoms of colds, allergies, and respiratory infections, providing both cough suppression and antihistamine effects to improve patient comfort. The flavoured syrupy base helps ensure the medication is well-tolerated, especially by children.