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Doctor insights on: Cetirizine Vs Fexofenadine

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Which is best zyrtec allegra (fexofenadine) claranex?

Which is best zyrtec allegra (fexofenadine) claranex?

Depends: All 3 of the mentioned new generation antihistamines (zyrtec, allegra, (fexofenadine) clarinex) are effective for treating allergic rhinitis and hives. What's interesting is that each individual person may respond better to one over the other. While every allergist probably has his/her favorite, truth is...They all work. If not happy with one, try a different one! ...Read more

Dr. Al Hegab
360 Doctors shared insights

Fexofenadine (Definition)

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


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Can I take zyrtec and allegra (fexofenadine) together?

Can I take zyrtec and allegra (fexofenadine) together?

Not advisable: I would not take both at the same time because these medications do the same thing and can have additive effects if used together. They are both antihistamines for the treatment of allergies. If one of these alone is not helping, sometimes switching to the other one is helpful. If none of these remedies work, then consultation with your doctor or allergist would be appropriate. ...Read more

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What's the difference between zyrtec and allegra (fexofenadine)?

What's the difference between zyrtec and allegra (fexofenadine)?

Different molecules: Zyrtec (cetirizine) is an antihistamine called ceterizine and Allegra is fexofenadine. They both block histamine type 1 receptors on cells and diminish the allergic reaction. Overall, they have the same effect for people, but some people prefer one more than the other based on their personal responses to the rx. ...Read more

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Is it ok to take a zyrtec after taking a allegra (fexofenadine)?

NO: Two antihystamines, not recommended. Take maximum dose of one and that is it! ...Read more

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What happens if I take four allegras (fexofenadine) and one zyrtec?

What happens if I take four allegras (fexofenadine) and one zyrtec?

Allergy meds: Hello. Allergy medication like zyrtec, Allegra and Claritin (loratadine) help with the symptoms of allergy. The dose for an adult is 180 mg for Allegra and 10 mg for zyrtec. If you take these meds on the same day, an increase in dryness as well as sedation will likely occur. Especially 4 Allegra and 1 zyrtec. There are other medications to help with your allergies. See your doctor. ...Read more

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Can I take allegra (fexofenadine) in the morning and zyrtec at night?

See your doctor: This is a high dose of antihistamines and should be best directed by an allergist. Sometimes the high doses are mandated to treat certain conditions, but not seasonal allergies. You should consult an allergist about your symptoms for the best way to treat them. ...Read more

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Is it safe to take allegra (fexofenadine) and zyrtec at the same time?

Is it safe to take allegra (fexofenadine) and zyrtec at the same time?

Allergy meds: Hello. Allergy medication like zyrtec and Allegra (fexofenadine) help with the symptoms of allergy. The dose for an adult is 180 mg for Allegra (fexofenadine) and 10 mg for zyrtec. If you take both on the same day, an increase in dryness as well as sedation will likely occur. There are other medications to help with your allergies. Instead of taking these two medications, see your doctor for other options. ...Read more

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Can I mix allegra (fexofenadine) & zyrtec for my allegy relief if allegra (fexofenadine) alone is not enough?

Can I mix allegra (fexofenadine) & zyrtec for my allegy relief if allegra (fexofenadine) alone is not enough?

You could, but: They do exactly the same thing so taking both is just like taking a double dose of one. Instead, you should try something from a different medication category, like a prescription nasal steroid spray. ...Read more

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What is better antihistamine Cetirizine or Fexofenadine?

I like Cetirizine: My personal preference is Zyrtec (cetirizine) however both have similar effects. Allegra (fexofenadine) could be considered the least sedating out of all the OTC antihistamines. ...Read more

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What is the difference between zyrtec and allegra (fexofenadine) d allergy?

What is the difference between zyrtec and allegra (fexofenadine) d allergy?

Decongestants: Most allergy medicines contain antihistamines, decongestants or a combination of the two. Antihistamines help runny, watery or itchy nose or eyes. Decongestants help congestion and stuffiness. Allegra, claritine and zyrtec are pure antihistamines. Allegra d, Claritin (loratadine) d and zyrtec d contain pseudo Ephedrine (sudafed).). 'd' stands for decongestant. At night it can keep you awake. ...Read more

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Is allegra (fexofenadine) or zyrtec safer? Which one has no cardiac effects at all?

Is allegra (fexofenadine) or zyrtec safer? Which one has no cardiac effects at all?

Allegra (fexofenadine) safer: Zyrtec causes sedation & slows reaction time in about 8% of users. Allegra (fexofenadine) does not. In high doses zyrtec can have adverse effects on cardiac rate & rhythm through its mild effects as an anticholinergic agent. Not so with allegra (fexofenadine). The parent compound of allegra (fexofenadine), terfenadine marketed as seldane, caused rare but serious heart rhythm problems. Allegra (fexofenadine) does not cause these problems at all. ...Read more

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I have daily hive break outs and use Allegra (fexofenadine) but I also have anxiety...could the Allegra (fexofenadine) be exacerbating my anxiety? Is Zyrtec better for anxiety?

I have daily hive break outs and use Allegra (fexofenadine) but I also have anxiety...could the Allegra (fexofenadine) be exacerbating my anxiety? Is Zyrtec better for anxiety?

Allegra (fexofenadine) vs Zyrtec: Allegra (fexofenadine) does not commonly cause or worsen anxiety. That said it can cause problems when taken in combination with other meds. It might be worth trying Zyrtec to see if there is any difference in your anxiety. Talk to your doctor about it and see what is the best option. Some common SE of Fexofenadine are:
headache
dizziness
diarrhea
vomiting
pain in the arms, legs, or back. ...Read more

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Which works best for dermographia, fexofenadine, loratidine, or cetirizine?

Cetirizine plus. ..: I think that of the otc antihistamines, Cetirizine is the most effective. However, I would combine this with Famotidine (pepcid) to block additional histamine receptors that are also present in your skin. ...Read more

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What's best for allergic cough-oxomemazine, cetirizine, loratidine or fexofenadine?

What's best for allergic cough-oxomemazine, cetirizine, loratidine or fexofenadine?

Post-nasal drips?: If the cough is from post-nasal drips, then I prefer using cetirizine or fexofenadine. A better option would be a nasal steroid. However if the cough is from a sinus infection, you may then need an antibiotic; from asthma, you will need asthma medications. Best to see a doctor. ...Read more

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Are there any new, more effective allergy meds than zyrtec, claratin, allegra (fexofenadine)...etc.?

Are there any new, more effective allergy meds than zyrtec, claratin, allegra (fexofenadine)...etc.?

Allergies - hayfever: Everyone is unique and that includes the distribution of histamine receptors that we all have. Thus some anti-histamines work well for some people while other meds don't. It's a matter of finding the right antihistamine for u. Older meds like Benadryl (diphenhydramine) might actually be worth a try. Seeing an allergist would be best as there are new meds just coming out now for allergies (grastek, oralair, Ragwitek ...Read more

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Is zyrtec or allegra (fexofenadine) better for chronic hives of unknown cause? Can I take either one daily & will it help hives go away?

Probably but: Yes, it usually helps and you may take even up to 4 x daily (or 4x the average dose) if necessary. Zyrtec works a little faster and may be more potent than Allegra (fexofenadine) but there is a small chance of getting drowsy.
At times hives can be so severe that no antihistamine would control them. If this has been present for >8 wks, consider seeing an allergist. ...Read more

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I read on the internet that it is often more effective to alternate days taking zyrtec and allegra, (fexofenadine) than just one drug alone. Is that true? -allergies

Maybe, but...: I have not heard of anyone benefiting from alternating days. More like alternating weeks or months on the meds. Wouldn't hurt to try, I guess. ...Read more

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Zyrtec or allegra (fexofenadine) for hives: which is the better antihistamine?

Zyrtec or allegra (fexofenadine) for hives: which is the better antihistamine?

Zyrtec (cetirizine): Which drug is better fora specific patient cannot be predicted. I generally try zyrtec first because it does cannot claim not sedating. A little sedation helps alleve itching. Allegra, (fexofenadine) claritn, and Clarinex are allowed to claim no sedation. ...Read more

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What antihistamine would be comparable to fexofenadine (allegra)? Is Claritin (loratadine) or zyrtec comparable?

What antihistamine would be comparable to fexofenadine (allegra)? Is Claritin (loratadine) or zyrtec comparable?

All similar: The various antihistamines such as fexofenidine, Claritin (loratadine) and zyrtec are comparable for allergy symptoms. Some people will find that one medication works better for them than another one. ...Read more

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What if I am concerned my hives are caused by an antihistamine in the first place? I.E. Zyrtec and allegra (fexofenadine)

Very rare: Hives usually come and go randomly. So you may confuse an outbreak with being caused by something else (though not really). So best to see an allergist. ...Read more

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Will anti histamines such as zyrtec or allegra (fexofenadine) so on, effect methacholine since its a histmane and cause negative results?

Will anti histamines such as zyrtec or allegra (fexofenadine) so on, effect methacholine since its a histmane and cause negative results?

It may potentially: Antihistamines are not to be taken for at least 24 hrs but preferably 72 hrs prior a methacholine challenge. Having said that, I would doubt the average dose of AH is potent enough to block a truly positive response. ...Read more

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Slightly higher eosonophil count. 6 months hv eosonophilc esophagits and skin itching. Did endo sopy. On omprezolle allegra (fexofenadine) and zyrtec. Not getng btr.

Slightly higher eosonophil count. 6 months hv eosonophilc esophagits and skin itching. Did endo sopy. On omprezolle allegra (fexofenadine) and zyrtec. Not getng btr.

EoE: Eosinophilic esophagitis is a newly defined disease. For a majority of adult, it is due to gastroesophaeal reflux disease. That is why omerprazole is first tried in your case. In children and some adult, it can be related to food allergy especially if omerprazole by itself does not help your symptoms. If this is the case, you need to be seen by an allergist. We are specialized in this condition. ...Read more

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I have very bad allergies. Allegra (fexofenadine) 180 use to work but it wears off fast. Zyrtec doesn't do anything what should I do. Always congested & feeling bad?

Other meds: Antihistamines do not manage congestion well which is why decongestants are often added. Singulair (montelukast) and nasal steroids manage all allergy symptoms and in head to head comparisons steroid sprays control symptoms better than oral antihistamines. Topical spray antihistamines are also an option. Allergy shots help reduce or eliminate medications in 2/3 of patients so may need to see allergist. ...Read more

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Which is safer to use allegra (fexofenadine) or zyrtec? I have glaucoma and heart problems.

Both: Both should be the same. However ask your pharmacist who knows your medication history to tell you which you should use, if either. ...Read more

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Rare urticaria. Why does zyrtec work well for it but when adding allegra (fexofenadine) the hives come more? Is allegra (fexofenadine) cancelling zyrtec out on some gene level?

It shouldn't: Zyrtec and Allegra (fexofenadine) work in similar fashion and actually the result should be additive. I suspect that you added Allegra (fexofenadine) because the hives are already getting worse. It takes about a hour before most oral drugs can get into your system. ...Read more

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Will allegra (fexofenadine) or zyrtec help treat fatique, mood disturbances, and facial tingling associated with histamine and cytokine release? Or is it only effective at treating the symptoms listed on the box?

Will allegra (fexofenadine) or zyrtec help treat fatique, mood disturbances, and facial tingling associated with histamine and cytokine release? Or is it only effective at treating the symptoms listed on the box?

Antihistamines: If the symptoms that you describe are coming from allergic rhinitis, then there is a likelihood that some of them will be helped with those medications. Remember that zyrtec may cause drowsiness a little more than some other meds except for benadryl (diphenhydramine). ...Read more

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Which is better to stop runny nose zyrtec or allegra (fexofenadine)?

Which is better to stop runny nose zyrtec or allegra (fexofenadine)?

Not much different: There are not much difference between two medications and they are weak medications for allergy symptoms. It might work in the beginning but you would need stronger and better treatment methods if your symptoms persist. ...Read more

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Allergist said if cholinergic urticaria doesn't improve, take 20 mg Zyrtec; Max limit is 20 mg zyrtec + 1 tab 180mg allegra (fexofenadine). Safe? Is it okay?

Yes: Yes, these doses of antihistamines are safe. But make sure you stay hydrated (drink lots of water throughout the day while on this dose). ...Read more

Dr. John Chiu
575 Doctors shared insights

Cetirizine (Definition)

Ceftirizine is the generic name of an antihistamine previously marketed under the ...Read more


Dr. John Chiu
551 Doctors shared insights

Zyrtec (Definition)

Zyrtec is a non-sedating antihistamine which is a kind of antihistamine type drug (common ...Read more