Pineapple juice has been shown to be 5 times more effective than cough syrup. It fights infection, kills bacteria, loosens mucus and suppresses coughs.

pineapplePineapple juice contains an enzyme called bromelain, which has anti-inflammatory properties and is effective to combat lung inflammation. It is used to treat arthritis and is also used in the treatment of inflammation and swelling in the nose and sinuses. 1 cup also contains half of your daily requirement of Vitamin C intake. Vitamin C is essential because as well as many other uses, it also enables your body to metabolize certain vital enzymes that regulate your metabolism and manage energy. Pineapple juice also contains manganese, which is a mineral that helps form healthy connective tissue and bones. It also works to absorb more calcium, metabolize carbohydrates and fats and increases regular nerve function. Pineapple juice helps to soothe sore throats and helps to loosen and expel mucus from your lungs more easily.
The study also indicates that the bromelain naturally present in pineapple may provide similar effects if the cough you suffer from is due to asthma. Pineapple juice has also been used to treat other respiratory ailments such as bronchitis, hay fever, asthma and pneumonia. It’s even being tested as a possible treatment for cancer and HIV.
Drinking pineapple juice instead of cough syrup is less expensive and has no toxic chemicals. Also a study also showed that when using pineapple juice patients recovered nearly 5 times faster from their ailments and exhibited a decrease in other symptoms related to coughing such as hacking.
If you suffer from persistent coughing from respiratory conditions such as COPD and asthma then by drinking pineapple juice not only does it soothe related ailments from persistent coughing but it suppresses the cough and helps to loosen mucus build-up and also aids in combating lung inflammation. This in itself can hugely improve your quality of life, help you to breathe better and help to reduce your symptoms and improve your condition. The naturally-occuring components also have other health benefits to aid in your overall health.
References: http://preventdisease.com and http://www.survivalmagazine.org