I am allergic to antihistamines (they will kill me) so I cannot take most otc remedies. Also, I don't recommend you take a cough medicine with codeine or another opiate added, as that will suppress your respiration, as any painkiller will. A lot of other cough remedies can aggravate inflammation. So I use, on my Doctor's advice, Mucinex, extra strength 12-hour, twice daily. Keeps my lungs completely free of trapped mucus. Loosens it and it comes right up, so none builds up. Also prevents a runny nose. At least for me it does. Really good stuff.