4 doctors weighed in:

Will Flonase or zyrtec (cetirizine) provide more allergy relief within the first two weeks?

4 doctors weighed in
Dr. Richard Zimon
Internal Medicine
2 doctors agree

In brief: Zyrtec (cetirizine)

The effect of Flonase takes time to develop.
The effect of anti-histamines like Zyrtec (cetirizine) are "immediate" and anti-histamines differ in effectiveness from person to person. Hope this helps Dr Z

In brief: Zyrtec (cetirizine)

The effect of Flonase takes time to develop.
The effect of anti-histamines like Zyrtec (cetirizine) are "immediate" and anti-histamines differ in effectiveness from person to person. Hope this helps Dr Z
Thank
1 comment
Dr. Franklyn Gergits
I agree. The Intra Nasal Steroids need approximately 10-14 days to reach full effect. Studies have shown improvent in patient symptom scores earlier but I usually have patients commit to 2weeks to determine effect. The antihistamines work quickly. Zyrtec or Ceterizine has the highest binding affinity for histamine and thus works the quickest compared to Claritin and Allegra.
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