Wheezing with a prolonged cold may indicate that your airways are irritated or inflamed. It is important to see your doctor to rule out bronchitis, asthma, or an underlying chest infection. Avoid taking any cough syrup on your own. Your doctor may prescribe inhalers, bronchodilators, or other medications to help open your airways and reduce inflammation.

Benadryl Congestion Relief Cough Syrup contains Ambroxol and Guaifenesin, which may help thin and loosen phlegm (mucus) in your airways, making it easier to cough up. Take the syrup exactly as directed on the label or by your doctor. Do not take it with other cough medicines containing similar ingredients, and consult your doctor if you have other health conditions or if symptoms persist for several days.