Montelukast
"OMG!! I've been taking singulair for one week. I haven't received my advair from the mail order pharmacy....but, singulair is a miracle. I had shortness of breath (SOB) and tight  chest - it felt like I was having angina. Really after the 1st dose I noticed I coughed less. Today I walked all the way from the back parking lot to my floor without stopping or SOB.  Didn't even have to use my inhaler. Amazing!"