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A member asked:
I'm transitioning from xyzal (levocetirizine) to allegra & my hives are returning. i seem to react to everything--my meds & enviorment. when will allegra kick in?
3 doctors weighed in across 2 answers
Stay with xyzal (lev: If one class of antihistaminic is controlling ur symptoms, better stick to it, especially that xyzal (levocetirizine) is supposedly non sedating and doesn't develop tolerance, ur allergist would direct u better.
Answered 5/6/2017
4.7k views
Reason?: We don't usually switch pills when you are doing well with it. Xyzal (levocetirizine) does have a slightly higher incidence of drowsiness compared to allegra. One would expect Allegra to take effect in about 2 hrs. If the reason for switch is due to drowsiness, then you may up the dose of Allegra to 2 to 4 x daily . If xyzal (levocetirizine) did not have side effects, then there is no reason to change to allegra.
Answered 6/19/2016
4.7k views
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