Doctor insights on:
Fexofenadine is an antihistamine which is used to treat allergies such as hayfever, and hives. It can be taken once or twice a day. It is a second generation antihistamine and does not cause as much drowsiness as other antihistamines such as Diphenhydramine (benaryl) or chlorpheniramine. Always be careful about drowsiness with any antihistamine especially if driving ...Read more
If allergic to 1 antihistamine, am i allergc to all? Have seen a few hives after benadryl, (diphenhydramine) xyzal, & now allegra. Coincidence or true allergy?
It is not possible to be allergic to all antihistamines and these are all different componds you listed. Benadryl, (diphenhydramine) xyzal and allegra. I would like to know what you call allergy, what are the symptoms and what kind of rash if any with these three antihistamine.
It is possible but this kind of allergy will be considered rare
consult your doctor who treated your allergies in first place;may beallergist. ...Read more
Is Xyzal supposed to lose effect more quickly than Allegra because time to maximum plasma concentration is shorter?
Not to my knowledge: They are all 24h formulations.Get a more detailed answer ›
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?
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. ...Read more
I was prescribed xyzal (levocetirizine) for my allergies. I took an allegra this morning. Should I start the xyzal (levocetirizine) tonight or wait until tomorrow?
What antihistamines give me 24hr protection? Allegra 180mg? Can I take Xyzal (levocetirizine) 5mg at night and Allegra 180mg morning? Topping up prove effective?
I'm on allegra 180mg in the morning, xyzal (levocetirizine) 5mg at night, plus dymista and immun shots, and i still get a lot of white mucus when I do a sinus rinse why?
Is it OK to take 180 mg Allegra in AM and 10m Zyrtec AND Xyzal (levocetirizine) at dinner? Allergist said to take TWO Allegra, but I'm worried it's too much
Mixing antihistamine: Generally, it's best to follow one's doctor's instructions. If not wanting to take Allegra twice a day, and wanting to add a different antihistamine such as Zyrtec or Xyzal (levocetirizine), (levocetirizine) it is probably enough to take Zyrtec or Xyzal (levocetirizine) (one of them instead of both of them). Zyrtec and Xyzal (levocetirizine) are very similar. The makers of Xyzal (levocetirizine) say it is more effective than Zyrtec, but they are similar drugs. ...Read more
Was on xyzal (levocetirizine) for med allergies & chronic hives. Didn't like it so now trying allegra. Will allegra protect me during an alrgc reaction just as well?
Xyzal (levocetirizine) causes too many side effects so I want to switch to allegra 180mgs once a day. Will this protect me from allergies/hives as well as xyzal (levocetirizine)?
Yes it would: But why not run it by your doctor ...Read more
Need to control chronic hives and multiple drug allergies, too. Xyzal (levocetirizine) had too many side fx. Would allegra work?
Sounds like you need the help of a board certified allergist.
Good luck. ...Read more
I suffer all types of allergies-food, pollen etc.can I take allegra (fexofenadine) or levocetirizine for lifetime safely?
Prescribed allegra (fexofenadine) m once daily for 2 months and levocetirizine 5mg at night if necessary but feel allegra (fexofenadine) is causing upset stomach and fast pounding?
Then stop it: And check with your doctor, arrhythmia isn't known to be caused by fexofenadine, that was a known side effect of older antihistamines that were withdrawn, but given the symptoms you are suffering and you suspect very much fexofenadine (allegra) to be the cause, you can safely stop and ask your doctor for an alternative, and there are others, continue the levocetirizine, till you see your doctor ...Read more
Which third generation antihistamine is best for itchy flaky scalp and skin levocetirizine, desloratadine or fexofenadine?
None of them!: Good morning, itchy scalp is due to irritation to the nerves of skin of the scalp. There is a nerve signal going from the scalp to the brain telling that there is something not right on the scalp. Correcting the local condition of the scalp such as dryness, scaling, seborrhea, bacterial or fungal overgrowth, and skin flaking condition will relieve the itch. Antihistamines are not useful for this. ...Read more
Many reasons.: Allegra is an antihistamine which can be used for itching of the skin, nose, eyes. It is mainly used to treat allergic reactions and to relieve seasonal allergic eye and nose symptoms. It is not very effective for nasal congestion unless used with another medication such as a nasal steroid or oral decongestant. ...Read more