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Doctor insights on: Medicine For Allegra Allergy

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Why will happen if you take a Claritin (loratadine) 24 hour and then 12 hours later take an allegra allergy pill?

Why will happen if you take a Claritin (loratadine) 24 hour and then 12 hours later take an allegra allergy pill?

Not serious: Since it takes several doses of a medication to get therapeutic levels, taking a second allergy medication too soon should not have any bad effects. You may have a few more side effects. ...Read more

Dr. Lois Freisleben-Cook
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 Advil Sinus Congestion and Pain with Allegra Allergy 24 hour together? I have a cold with nasal congestion.

Can I take Advil Sinus Congestion and Pain with Allegra Allergy 24 hour together? I have a cold with nasal congestion.

No benefit: Yes, but there is no added benefit to take the Allegra (fexofenadine) since it doesn't help much when you have a cold. An older antihistamine like Chlorpheneramine may help with runny nose but may cause drowsiness. ...Read more

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Might I take allergy medicine (allegra) while I'm sick?

Might I take allergy medicine (allegra) while I'm sick?

Probably: I depends on what type of illness it is. Most of the time antihistamines such as Allegra (fexofenadine) are safe. Best to ask your doctor if it is appropriate in your situation. ...Read more

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When should I take allergy medicine allegra (fexofenadine)?

Without food: Fexofenadine (allegra) comes in 2 doses for adults, 60 mg. And 180 mg. The 60 mg dose is taken twice a day, every 12 hr. The 180 mg dose is taken once a day, usually in the morning and it is more effective than 60 mg, 2x/day. Fexofenadine should always be taken 1 hr. Before food because food, especially fatty food, interferes with fexofenadine absorption. ...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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Does the allergy medicine Allegra (fexofenadine) come in different doses depending on ur height &weight? If so what would be the proper dose for a 19 yr old 117 5'6

Does the allergy medicine Allegra (fexofenadine) come in different doses depending on ur height &weight? If so what would be the proper dose for a 19 yr old 117 5'6

Age matters if...: 19 y/o Male asks Does the allergy medicine Allegra (fexofenadine) come in different doses depending on your height & weight? Allegra (fexofenadine) is usually 180mg for adults but can come in less doses 5, 30, 45, even 70mg depending on other health conditions like Kidney function provided one does not exceed 180mg in 24hr. Age matters if one is Elderly, but at 19 years, standard 180mg/ day dosing should be fine. ...Read more

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Allegra (fexofenadine) -d 12 hour allergy & congestion can show up on a drug test as amphetamine?

Allegra (fexofenadine) -d 12 hour allergy & congestion can show up on a drug test as amphetamine?

Possible: Since the Pseudoephedrine in the d is often used to manufacture amphetamine, I would guess that it can show up in a blood test. I would advise you to stay off of any decongestants if you are subjected to random drug test until I can look this up. ...Read more

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I have seasonal allergy and taking allegra (fexofenadine) d 24 hour. My blood pressure is gone up. Can the drug be the cause? Will my BP go down when I stop?

I have seasonal allergy and taking allegra (fexofenadine) d 24 hour. My blood pressure is gone up. Can the drug be the cause? Will my BP go down when I stop?

The D in your meds: Is sudafed which is a stimulant, thus it can raise the blood pressure. Once u stop taking the meds, the BP should normalize. Consider switching to plain Allegra, Claritin (loratadine) or zyrtec which have minimal effect on bp. Take care! ...Read more

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Allegra (fexofenadine) allergy treated with what medication?

Allegra (fexofenadine) allergy: I am not quite sure of the question. Allegra (fexofenadine) is a non drowsy antihistamine to treat symptoms of allergic or non allergic rhinitis. The symptoms include runny stuffy nose, sneezing, itchy and watery eyes. It can also help itching of the skin.
If your question is not answered, please clarify the question. ...Read more

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For how long is it safe to take allegra (fexofenadine) for allergies?

Long term: Allegra (fexofenadine) is a new generation, non-drowsy antihistamine with a good safety profile. In general antihistamines as a class have been around for decades and long term use has not been associated harmful side effects. Most clinical trials for safety are 1 year, but practically speaking, Allegra is safe for ongoing use. ...Read more

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Allegra (fexofenadine) allergy should be treated with what medication?

Probably none.: If you have had an adverse reaction to allegra, (fexofenadine) you should simply avoid it in the future. Immediate treatment might require other antihistamines or systemic corticosteroids - but this is unlikely. ...Read more

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What is the definition or description of: allegra (fexofenadine) allergy?

What is the definition or description of: allegra (fexofenadine) allergy?

Allegra (fexofenadine) allergy: Allegra is a brand name for a medication used to treat hay fever and allergy symptoms. It is a type of anti histamine that reduces or blocks histamine. Histamine can cause itching, sneezing, runny nose, and watery eyes. Antihistamines stop these allergy symptoms. Allegra belongs to a newer generation of antihistamine medications that produce less drowsiness associated w older drugs like benadryl (diphenhydramine). ...Read more

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How much allegra (fexofenadine) can I give an 8 month old with allergies. 20 lbs?

How much allegra (fexofenadine) can I give an 8 month old with allergies. 20 lbs?

Ask pediatrician: Children's Allegra (fexofenadine) is recommend for two years and up. I would consult pediatrician on advisability of giving Allegra (fexofenadine) to 8 month old. ...Read more

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Is it okay for me to take my daily allegra (fexofenadine) allergy pill before a test?

Is it okay for me to take my daily allegra (fexofenadine) allergy pill before a test?

Yes: Fexofenadine, or Allegra (fexofenadine) has no effect on the central nervous system or brain, even at high doses. There should be no sedation or impairment of your ability to take the exam. An interesting controlled study from the netherlands several years ago did show, however, that non-allergic students did better than allergic students even with treatment with clartin, a non-sedating antihistamiine. So study! ...Read more

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Could take allegra (fexofenadine) allergy 24 hrs and allegra (fexofenadine) d in the same day?

Could take allegra (fexofenadine) allergy 24 hrs and allegra (fexofenadine) d in the same day?

Yes, but why: While it is best to avoid high doses of "d" which is pseudoephedrine-decongestant, an extra dose of Allegra (fexofenadine) is unlikely to be harmful. However, if a person needs extra medication, then it is best to do it under the direction of a physician and probably an allergist to assist in identifying the cause of the allergy. There are better ways to manage allergies than doubling up! ...Read more

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I started taking allegra (fexofenadine) d for my allergies my appetite decreased. Is this one of its side effects?

I started taking allegra (fexofenadine) d for my allergies my appetite decreased. Is this one of its side effects?

Could be related: Allegra (fexofenadine) d has not been usually associated with decreased appetite. The Pseudoephedrine which is the d part of the Allegra (fexofenadine) d can cause nausea in very few patients and if that is the symptom you are experiencing then you won't experience this with plain allegra (fexofenadine). ...Read more

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Are there any negative side effects if I take one 180mg allegra (fexofenadine) tablet daily for years? I have allergies all yr.

Are there any negative side effects if I take one 180mg allegra (fexofenadine) tablet daily for years? I have allergies all yr.

Probably not, but: New generation antihstamines are in general safe and effective. However, the best treatment for year round allergies is 1) avoidance of the allergic trigger; 2) antihistamines like allegra; 3) topical nasal steroid sprays (most effective); 4) allergy injections--will provide relief in majority of people and decrease need for medications. ...Read more

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I have always had allergies and I took allegra (fexofenadine) and it worked for months flawlessly except mental fog, now it won't help with allergies?

I have always had allergies and I took allegra (fexofenadine) and it worked for months flawlessly except mental fog, now it won't help with allergies?

Choices exist: Some antihistamines help some people more than others. Zyrtec, Allegra, or Claritin are available as over the counter Rx. Switching may be helpful. There is available by prescription and OTC nasal steroid spray medications that are helpful. There are other medications such as oral antileukotrienes, nasal antihistamine sprays, & combination antihistamine/nasal steroid sprays available. See MD. ...Read more

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Is it okay to take loratadine and Allegra (fexofenadine) together in the morning for combined effectiveness. Should I seek allergy shot. How good is it?

Is it okay to take loratadine and Allegra (fexofenadine) together in the morning for combined effectiveness. Should I seek allergy shot. How good is it?

Not recommended: Unless your physician or allergist specifically told you to take two allergy medicines together, this is generally not recommended. Allergy shots, or immunotherapy, may be of value to you since your symptoms are so difficult to control. ...Read more

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I have cat allergies. We just got a Siberian cat, but I am still having slight reactions. Is it safe to take Allegra (fexofenadine) everyday? Other tips?

I have cat allergies. We just got a Siberian cat, but I am still having slight reactions. Is it safe to take Allegra (fexofenadine) everyday? Other tips?

Yes: Keep the cat out of the bedroom
HEPA air filter appropriate for the room size
HEPA vacuum cleaner
Smooth surface flooring and furniture
Consider a nasal steroid if worsening
consider allergy shots ...Read more

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If I ignore my allergy symptoms, will they become worse over time? I have them all year long. Which is the best med for relief, allegra (fexofenadine)? I'm 35.

See below: Allergy symptoms do not necessarily become worse with time. The best med is the one that works. Loratidine, fexofenadine and Cetirizine are all good meds. You may benefit from some targeted therapy on top of this. Maybe additional topical meds for your skin, nose, eyes or lungs depending on your symptoms. ...Read more

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Could you take cold and allergy pe with allegra (fexofenadine)?

Could you take cold and allergy pe with allegra (fexofenadine)?

No: No usually not. The cold and allergy medication might have the anti-allergic ingredients already. ...Read more

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Spring allergy not getting better even after 180mg of Allegra (fexofenadine)?

May see: A doctor to consider addition of steroid nasal spray or and leukotriene inhibitor. ...Read more

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Shouldn't allegra (fexofenadine) be helping my allergies? Why are shots so much better?

Shouldn't allegra (fexofenadine) be helping my allergies? Why are shots so much better?

Allergies: Allegra (fexofenadine) and other antihistamines work up to a certain point and do not cure allergies, just control the symptoms. Some patients need more than one medication to control their allergies and some no longer respond to meds. Shots from a board certified allergist can provide you long term relief and decrease your dependence on medications and can potentially cure you. ...Read more

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Hello I took two Allegra (fexofenadine) tablets for my allergies that I was given, its the dosage an ok amount?

Fine, but: Don't over-do it, you didn't mention which concentration of allegra (fexofenadine) you received, at any rate stick to recommended/prescribed dosage, good luck ...Read more

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I have allergies but can't take allegra (fexofenadine) cause it makes me feel really drugged. Is it ok for me to just half of it every morning?

I have allergies but can't take allegra (fexofenadine) cause it makes me feel really drugged. Is it ok for me to just half of it every morning?

Better option: You could but it will probably be less effective. I would consider trying an alternative antihistamine. Zyrtec or Claritin are OTC or Xyzal (levocetirizine) is prescription. You may also want to consider a nose spray or even allergy shots (see an Allergist). ...Read more

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I have multiple allergies causing symptoms daily. Using Allegra, (fexofenadine) but only when symptoms are bad. Would it be better to take it every day?

Allergy meds: Allegra is safe to take daily for allergy symptoms. It takes less than an hour to help, so the decision to take it can be made daily. It doesn't matter what time it is taken. Nasal steroid sprays Nasacort (triamcinolone) and Flonase are now OTC. These help, but it takes a few days, so there is a better effect over time if they are taken daily. If symptoms aren't relieved with both types of meds, see an allergist ...Read more

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Can a person safely take Claritin (loratadine) or allegra for allergies?

Can a person safely take Claritin (loratadine) or allegra for allergies?

They are safe meds: Claritin/allegra, available otc as generic loratadine/fexofenadine, are nonsedating antihistamines, often used for seasonal allergic rhinitis. They are relatively good medicines with low incidence of side effects. Also sold in combo with decongestant, -d (pseudoephedrine), for those having much trouble with nasal congestion. If u have trouble and these meds not adequate, consult doc. Good luck. ...Read more

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I am pregnant is that ok to take allegra (fexofenadine) for allergy pills?

I am pregnant is that ok to take allegra (fexofenadine) for allergy pills?

Yes: In general allegra, zyrtec, benadryl, (diphenhydramine) and Claritin are all ok for allergies (as well as many others) during pregnancy. Follow the directions on the packaging or prescription and talk to your doctor if symptoms persist or you have questions. ...Read more

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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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I take allegra (fexofenadine) for my allergies now im pregnant can I still take them?

No: Allegra is a class c drug which means that it might cause harm to the baby.
Class b drugs are a better choice as they are thought not to harm the pregnancy.
Class b allergy medications include zyrtek, Claritin and Benadryl (diphenhydramine) (benadryl (diphenhydramine) makes most people sleepy).
Nasal steroid sprays like Nasonex are usually considered safe.
Call otis at 866-626-6847 for questions about drug safety in pregnancy. ...Read more

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Will allegra (fexofenadine) 180 taken once each night protect against hives and allergies for a full 24 hrs?

Yes it would: But if it doesn't or you need more medicines to control your symptoms, please see your doctor, read the instructions carefully ...Read more

Dr. John Chiu
2,638 Doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


Dr. Michael Finkelstein
382 Doctors shared insights

Allegra (Definition)

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