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Doctor insights on: Medicine For Oral Antihistamine Allergy

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What is the best allergy treatment for eyes I mean the best eye drops for allergy. Not over-the-counter drugs. Oral antihistamine alone not helping.

What is the best allergy treatment for eyes I mean the best eye drops for allergy. Not over-the-counter drugs. Oral antihistamine alone not helping.

Patanol (olopatadine): I prefer patanol (olopatadine) drops. There are others which are similar. The important thing is to wash your face with a cool wash cloth before applying to remove any lingering allergens from your facial skin and around your eyes. This helps my patients a great deal. If you're not better with drops see an allergist for testing, you may want to consider allergy shots. ...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


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Can oral antihistamines stop the itchiness from allergies?

Can oral antihistamines stop the itchiness from allergies?

Antihistamine: It may help depending on which type of allergic reactions you get and which organ systems are affected. Can you be more specific? ...Read more

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Do antihistamines like Benadryl (diphenhydramine) help prevent oral allergy syndrome?

Do antihistamines like Benadryl (diphenhydramine) help prevent oral allergy syndrome?

Probably not: Oral allergy syndrome is usually caused by pollens and sometimes nuts.
Claritin, zyrtec and Allegra (fexofenadine) can help with pollen allergies. But like any other allergy, it is best to stay away from the problem. Have an allergist test you and see what treatment would be best. ...Read more

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Does pollen season make oral allergy syndrome worse despite taking antihistamines?

Does pollen season make oral allergy syndrome worse despite taking antihistamines?

Yes it can: That's why you need to know the triggers well, try to avoid them as much as you can, ask your doctor about keeping an Epipen (epinephrine) handy, just in case a severe reaction develops, see an allergist if you can for complete assessment. Check aaaai. Org or acaai. Org for an allergist in your area, good luck ...Read more

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Are there any non-sedative antihistamines that work like doxylamine? It is the only drug that helps my allergies. Claritin/lortadine do not help.

Are there any non-sedative antihistamines that work like doxylamine? It is the only drug that helps my allergies. Claritin/lortadine do not help.

Yes: Doxylamine has anti-allergy power superior to almost every other antihistamine on the market, with the exception of Diphenhydramine (benadryl), which is also sedating.

Other than claritin/loratadine, there are other non-sedating antihistamines such as allergra (fexofenadine). Zyrtec (cetirizine) (ceterizine) is generally non-sedating although ~5% feel sedated with it. ...Read more

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What are the risks of low-dose oral prednisone taken over 1 or 2 decades? I am a vet with allergies to pets. Antihistamines not effective anymore.

What are the risks of low-dose oral prednisone taken over 1 or 2 decades? I am a vet with allergies to pets. Antihistamines not effective anymore.

It depends how low: If the dose is low it will replace what your adrenal makes. Even at that level it is tough sometimes to get off of it. With high doses bad problems can occur in all areas of your body. Talk to your doctor or get another opinion about what is best. Thank you for your service. ...Read more

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Have severe allergies but all antihistamines cause constipation and abdominal distress. What alternative treatment/medicine is available?

Have severe allergies but all antihistamines cause constipation and abdominal distress. What alternative treatment/medicine is available?

Certain nasal sprays: In the US, Nasacort (triamcinolone) just went over the counter-- works great for hay fever/resp allergies, nasal congestion, post nasal drip. For eye allergies, OTC drops like Opcon A are helpful. If you have skin allergies, itching, hives, etc, the best option is to talk to your doc. Sometimes a medication like singular can help, or certain topical medications. Good luck! ...Read more

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When is the best time to take an antihistamines for an allergy? Why?

When is the best time to take an antihistamines for an allergy? Why?

It depends: It depends on the antihistamine and when you are exposed to the cause for your allergies. Antihistamine pills generally take at least 30 minutes to two hours to take effect and peak hours later. Pollen levels are highest in the morning, but if you are exposed to other allergens such as animal dander or dust, those levels would affect you at night. Take it a few hours before your worst time. ...Read more

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What are some good natural alternatives to taking antihistamines for allergies?

What are some good natural alternatives to taking antihistamines for allergies?

Natural: Consider saline nasal rises such as neilmed that you can get at any pharmacy without a prescription to remove nasal allergies but also using a otc med such as naph con a. ...Read more

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Can antihistamines help itching not related to allergies?

Yes and no: Antihistamines, as their name implies, effectively treat itching caused by histamine released from immune cells. This includes allergies, but also other disorders that cause histamine release, like chronic hives or mastocytosis. Itching from other causes, like liver disease or disorders of the nerves, typically does not respond to antihistamines. Talk with your doctor for more info. ...Read more

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What to do if I cannot take antihistamines, how can I get allergy relief?

What to do if I cannot take antihistamines, how can I get allergy relief?

Options to treat: 1. AVOIDANCE (strategies depend on what you're allergic to. For pollen use A/C, close windows, wash face and hands when you get home)
2. nasal steroid spray
3. antihistamine nasal spray
4. antihistamine eye drops
5. allergy shots ...Read more

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Is it right that for those who have allergies and are taking antihistamines, the mucus will become thicker?

Is it right that for those who have allergies and are taking antihistamines, the mucus will become thicker?

Depends: First generation antihistamines have some antocholinergic properties that can thicken mucus. Second generation antihistamines not so much. Depends on what medication you are taking. ...Read more

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My son isn't allowed to take antihistamines for seven days before his allergy tests. What should I do to treat his symptoms?

My son isn't allowed to take antihistamines for seven days before his allergy tests. What should I do to treat his symptoms?

Topicals: Treat based on symptoms. These shouldn't interfere w tests. Itching and eczema can be helped by keeping the skin cool, using Benadryl (diphenhydramine) gel, cortaid, sarna lotion, or any of the cooling gels. Soaking him with cool, wet towels can help, or even bathing in j&j vapor bath can be helpful + soothe raw skin. Sinus rinses, a neti pot, steroid or antihistamine nasal sprays, or saline nasal gel can help. ...Read more

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My name's Julie. I'm not usually bothered by seasonal allergies I am this year. If you take enough antihistamines will it build up in the system?

My name's Julie. I'm not usually bothered by seasonal allergies I am this year. If you take enough antihistamines will it build up in the system?

Nasal allergies: Antihistamines can offer relief for mild symptoms and may build up. Nasal steroids (Namsacort and Flonase are nonprescription) are going to be more effective for most people. The nasal steroids usually take 2-3 days to start making a difference and reach full effect the in 2 weeks. They are best used regularly in the season. Prescription antihistamine nasal sprays that work in 30 minutes. ...Read more

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Are allergies bad for your health? If so, why do doctors recommend antihistamines? Isn't that making the allergies worse while lessening the symptoms?

Agree with Dr. Chiu: Antihistamines give symptomatic relief but don't effect the course of allergies one way or another. Let me answer what I think you are getting at. In many diseases masking the symptoms is like a band aid and a mistake to not treat the underlying cause. Some people actually do get over allergies by themselves but not most. Allergy immunotherapy is the only treatment that affects the disease ...Read more

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I seem to have developed an allergy to our new dogs. Tried several antihistamines but Benadryl (diphenhydramine) works best. Can I take on a regular basis?

I seem to have developed an allergy to our new dogs. Tried several antihistamines but Benadryl (diphenhydramine) works best. Can I take on a regular basis?

Allergy: Remember the best treatment is avoidance and we have the same problem. I'd sacrifice to be with my dogs too, hehehe. If you can tolerate Benadryl (diphenhydramine) and it's the only thing that works, you can take it regularly, but remember, it can make you sleepy. Have fun with the dogs, I hope you will develop tolerance. ...Read more

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Have you ever heard of anyone w/true allergy to benadryl (diphenhydramine)? Would this allergy be likely to turn serious? How can someone be allergic to antihistamines?

Yes: Good question. It is very rare but does happen. Sometimes they are not allergic to the Diphenhydramine but the dyes and fillers used to make the medicine. But people have also had reactions to dye free benadryl (diphenhydramine). You can develop an allergy to anything. I have seen people with Benadryl (diphenhydramine) allergy who could take other antihistamines such as hydroxyzine. ...Read more

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Is it safe to take antihistamines for banana allergies?

Is it safe to take antihistamines for banana allergies?

Yes depending: It depends on the symptoms. Antihistamines will help itching rashes sneezing, runny nose but you may need additional medicine for cough and wheeze. ...Read more

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If antihistamines help an itch, is the itch likely caused by some allergies?

If antihistamines help an itch, is the itch likely caused by some allergies?

Possibly: That is most likely the case, however other processes can cause histamine release without being a true allergy. Also, some non selective histamine blockers like Benadryl (diphenhydramine) are sedating and decrease itch through that mechanism as well. ...Read more

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Antihistamines seems to wear off at ~8 hours, followed by allergies later. How much antihistamine should I take everyday? Is too much a day harmful?

Antihistamines seems to wear off at ~8 hours, followed by allergies later. How much antihistamine should I take everyday? Is too much a day harmful?

4x/day: With non-sedating antihistamine, you can take it up to 4x daily. However if your symptoms are that severe, you need to consult an allergist since antihistamine alone rarely provides enough relief since it does nothing on the nasal congestion. ...Read more

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How can I control my dust allergies without taking any antihistamines?

How can I control my dust allergies without taking any antihistamines?

Dust allergy: If possible at all, stay away from wall-to-wall carpeting, fabric window drapes. For forced- air heating systems, apply filters on registers, if not, vacuum your carpets daily using a hepa filter. Wipe dust off all surfaces (no feather dusters). Keep away dust collectors - books, stuffed animals from bedrooms. Encase mattresses and pillows in dust-mite resistant material. ...Read more

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Can antihistamines be a good strategy for managing environmental allergies?

Can antihistamines be a good strategy for managing environmental allergies?

It's a start: It's a start. Usually not completely sufficient. Seeing an allergist and coming up with the best plan together is your best option. Other home remedies are avoidance of known triggers, no pets on bed or in bedroom, washing floors and sheets more frequently, salt water washes. See an allergist. ...Read more

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I'm curious what occurs if I forget to stop taking antihistamines before allergy testing?

I'm curious what occurs if I forget to stop taking antihistamines before allergy testing?

May alter test: When allergy testing you expose the mast cells that release histamine to possible allergins. If allergic there is a histamine release. It is this histamine that gives you the watery eyes, runny nose and general allergic feeling.
Taking antihistamines during testing would likely blunt the release and probably alter the results making you seem less allergic to the allergn. ...Read more

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Can you tell me what occurs if I forget to stop taking antihistamines before allergy testing?

No response: The antihistamines block the natural immune response to a certain stimulus you may be allergic to. If you take them before an allergy test you may not respond appropriately. So the test results may be wrong. ...Read more

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What is the best way to treat seasonal allergies if you can, t use antihistamines because of prostatitis?

What is the best way to treat seasonal allergies if you can, t use antihistamines because of prostatitis?

Steroid inhaler: Talk to your doctor about steroid inhalers. You should also talk to him or her about getting allergy shots on a regular basis. ...Read more

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I have an allergy to latex. Is there a sublingual option for antihistamines or maybe an injection available? Please let me know.

I have an allergy to latex. Is there a sublingual option for antihistamines or maybe an injection available? Please let me know.

No: There are no sublingual antihistamine or injected emergency forms. Recommend seeing an Allergist to better characterize the nature/severity of Allergy and to determine if you should be carrying an epipen for safety purposes. Know that if severe, you will do well to avoid live poinsettia plants during the holiday season. Benadryl (diphenhydramine) is fastest acting, but sedating. Zyrtec provides longer lasting effec ...Read more

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I do believe the allergy shots indirectly are causing an inflammatory response in my body along with antihistamines adding to it. What can I do? I'm about to stop the shots. I do not want to gain anymore weight.

I do believe the allergy shots indirectly are causing an inflammatory response in my body along with antihistamines adding to it. What can I do? I'm about to stop the shots. I do not want to gain anymore weight.

Unlikely: That allergy shots cause inflammatory response or induce weight gain, antihistamines rather are appetite stimulants, review your problems with your doctor / allergist, good luck ...Read more

Dr. James Lin
203 Doctors shared insights

Oral Antihistamine (Definition)

Oral antihistamines such as diphenhydramine (Benadryl) or hydroxyzine (Atarax, Vistaril) can help to reduce itching, ...Read more


Dr. Paul Carter
648 Doctors shared insights

Antihistamine (Definition)

Sedating and non-sedating antihistamines prevent and treat allergic reactions, and are ...Read more