it works by narrowing the blood vessels in the nasal passages, which reduces swelling and congestion. It is also an antihistamine that works by blocking the action of histamine, which helps to reduce allergy symptoms such as sneezing, itching, and runny nose. It works as a cough suppressant by reducing the cough reflex in the brain. Overall it relieve symptoms associated with the common cold, allergies, and respiratory infections by reducing congestion, suppressing cough, and relieving itching and sneezing.It is important to take this medication as directed by a healthcare professional and to report any side effects or concerns to a doctor. This medication may not be appropriate for everyone, so it is important to discuss any medical conditions or other medications being taken with a doctor before starting treatment. Additionally, it is important to avoid taking more than the recommended dose or taking this medication with other cold and flu medications without first consulting a healthcare professional.