Hi there and thank you for the question. I am a Registered Nurse and will be happy to help you today.
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Have you been diagnosed with post nasal drainage? This can cause a nagging cough and so can GERD (acid reflux). If you have fluid in the ears, you most likely have sinus involvement too. You may also benefit from an antihistime (like Zyrtec). If you have already tried the antihistime, you can try something for GERD to see if that helps. If you are taking other medications, let your Dr know first before you start taking anything else though.