I added Clarinex D to my Nasonex and Singulair today is day 2 and I seem to be doing better. I also bought a Night Guard at Target not a sports one this is one for people who grind or clench their teeth. Slept with it last night, don't know how long as i woke up this morning holding it. Hopefully I am on an upward trend now. Oh and only 1 headache today, and it did not require migraine meds.

The best antihistamine I think is available OTC it is a first generation antihistamine meaning that it may cause drowsiness. Its generic name is chlorphenermine, brand Chlor-Trimeton. Generic it is really cheap and is best when combined with pseudoephedrine (the stuff they put behind the Rx counter) . The only way I know it is lik this is at Walgreens and it is their generic for Sudafed Sinus and Allergy. Ironically the brand does not contain real "sudafed" so you have to get the generic. Like I said it may cause some drowsiness but it is not near what benadryl is (For me it doesn't cause drowsiness). Because it is somewhat sedating it works better on allergies. Even better than Allegra, Zyrtec, Clarinex, and Claritin (All second generation non-sedating antihistamines.)

Singulair is mostly for asthma and as mentioned only works if you have been on it for several weeks and you are taking it every day. I would leave it to asthma/COPD patients.