asthma
"I took Dulera 200 for about 3 months.  After a month I experienced heart palpitations (heart rate from 80 to 188 in seconds).  At first it would only last 2-3 minutes.  Then palpitations lasted over an hour, then two hours.  Ended up in the ER four times, twice to receive an IV drug to reset and slow my heart beat.  Cardiologist at the hospital put me on Diltiazem to control my heart rate.  It lowered blood pressure (was already good), but did not stop heart palpitations.  Began having breathing problems and doctor increased Diltiazem dosage.  Experienced worse breathing issues and loss of bladder control.  Finally realized the Diltiazem caused breathing problems and Dulera was causing the racing heart palpitations.  Nightmare!"