Montelukast
"I am a 46-year-old woman that suffers from severe allergies and severe asthma since I was 12. I have been take the generic singular forever. It does nothing for me. I only take because both my pcp and pulmonologist insist I take it.  

            I am miserable everyday. I still have to take a generic form on actives to get any relief. None of the others help either . Zyrtec, Allegera, and Claritan are worthless for me too.

I am happy for anyone this drug helps. It is worthless to me.:-("