Yes, Zyrtec works for 24 hours regardless of when you take them. I take mine at night because of the drowsiness and it helps tremendously. Clariten makes a great eye drop for allergies. Personally, I think that works better then Bausch & Lomb. However, if that doesn't help a prescription allergy eye drop will work even better.
I have two air purifiers. Mine is called Blueair and it works pretty good, but the filter replacements are sort of expensive. $80 a piece.
Moderator-Allergies/Asthma and Alzheimer's, Co-moderator-UC
~Left sided Uc-'92**Unable to tolerate ALL mesalamines**
Colazal(9 daily)/6mp(50mgs)/Bentyl-Prilosec~allergies-Singulair/Zyrtec~Reynauds~OA-Tylonel Arthritis~Scoliosis~Sacroilitis~Dry eye-Restasis~GAD-Klonopin (.25mgs)~Rosacea-Metrogel/Elidel~IBS~Diverticulosis~Fibromyalgia