Im 36 , my pneumologo put me on a treatment for 30 days Zyrtec D and Singular on day 6 w quit Zyrtec provoque me and arrithmia, the 3 days later quit Singulair, sence of more dryness and irregular arrithmia. Go to the original I was before just Clarinex and I felt very bad take a spray shot of Beconase