birth control
"I am writing to share my experience.  The pill worked great for me in the period and mood sense but I developed a chronic cough.  The doctors kept telling me it was unrelated and I began taking all kinds of allergy meds which did little to help.  Then inhalers which helped but caused other issues.  This went on for 4 years.  I now am off the pill and the cough has stopped.  I can't believe no one else has ever had this problem."