Hi. I have been fighting something ugly for over a month, and it has caused me to be extremely tired and and to cough... alot! After trying serveral different things (prednisone, azithromiacin, cough syrup with codeine), and nothing helping, my doctor prescribed Zirtec and Montelukast yesterday. I must admit, I am feeling better, and have not coughed much today, all of a sudden, I am noticing that my tongue, finger tips, and tips of my toes are starting to itch. Is this something to worry about, or is it just something to live through?