You may take Benadryl Cough Formula Syrup to help relieve your cough, reduce throat irritation, and loosen mucus. Take it exactly as directed on the label or by your doctor. If your cough persists for more than two weeks, becomes severe, or is accompanied by fever or difficulty breathing, please consult a doctor to rule out any underlying conditions.

A cough with phlegm for 2 years, especially if you smoke daily, is often due to chronic bronchitis or smoking-related lung damage. The most important step is to stop smoking, as this is the main cause and continuing will worsen the problem. You should see a chest physician for tests like a chest X-ray and breathing tests. Treatment may include inhalers, medicines to thin mucus, and lifestyle changes. Early care can prevent long-term lung damage.

If you have a long-term cough from smoking and drinking cold drinks, stay hydrated, use a humidifier, avoid cold or dusty places, and try steam inhalation. It is also essential to consult a doctor to rule out infections, asthma, or acid reflux as causes.

A cough lasting 4-6 months often comes from untreated allergies, acid reflux, asthma, or post-nasal drip, not infection. If it keeps returning, you may need a chest X-ray, spirometry, or reflux treatment to find the exact cause and treat it properly.