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Doctor insights on: Allergy To Antihistamines

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My 13 yo son has a constant colds. Doctor said it is an allergy. Gave antihistamine but no effect. Does he need antibiotics?

My 13 yo son has a constant colds. Doctor said it is an allergy. Gave antihistamine but no effect. Does he need antibiotics?

Maybe: If he's been congested for many weeks or months, he could easily have bacterial sinusitis that responds to antibiotics. But if he does have an underlying allergic problem, he also needs more intensive treatment for that, to try to prevent a long series of sinus infections. ...Read more

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Dr. John Chiu
2,491 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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I have migraine and the doctors gave me Topamax, (topiramate) when i took "50 G" i affected by Glaucoma and i have allergies but antihistamine is forbidden!!

I have migraine and the doctors gave me Topamax, (topiramate) when i took "50 G" i affected by Glaucoma and i have allergies but antihistamine is forbidden!!

?: Can't really understand your question/point,if you mean topamax (topiramate) would affect your glaucoma, unlikely and depends on the type of glaucoma,please ask your ophthalmologist as glaucoma is a serious disease, if you are asking whether topamax (topiramate) would interact with antihistamines, yes it would,and not advisable together,2nd generation antihistamines as loratadine or cetirizine won't affect glaucoma though ...Read more

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Dry Skin around both eyes and itchy eye corner. Also very itchy head scalp only at the back of head. Started month or two back. Taking allergy medicine (antihistamine) no help. Pl advice.

Dry Skin around both eyes and itchy eye corner. Also very itchy head scalp only at the back of head. Started month or two back. Taking allergy medicine (antihistamine) no help. Pl advice.

Skin, eyes, head: If antihistamine is not of help to you must, as soon as possible, see your primary doctor to help you get rid of symptoms. Your doctor might want to send you to a specialist. Please let me know what develops. ...Read more

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Allergy shots or antihistamine pills which works better?

Allergy shots or antihistamine pills which works better?

Allergy shots: antihistamines only cover up symptoms and don't cure anything. Allergy shots treat the cause and that is why with successful immunotherapy you can get rid of antihistames. One complication of nasal allergy treated symptomatically is development of asthma. On the other hand if you treat the cause you prevent complications ...Read more

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If I have an allergy to one antihistamine, is it more likely to also be allergic to another? Even though they r different chemicals?

If I have an allergy to one antihistamine, is it more likely to also be allergic to another? Even though they r different chemicals?

Not necessarily: Most people will tolerate a different antihistamine even if they had a reaction to another. The exception might be antihistamines such as zyrtec and xyzal (levocetirizine) which are closely related. ...Read more

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How can allergy shots and antihistamine help reduce the symtoms of pollen allergies ?

How can allergy shots and antihistamine help reduce the symtoms of pollen allergies ?

Changes Immune Sy: Allergy vaccine therapy works by changing the way in which one's body sees an allergen. Instead of seeing the pollen as an allergen with allergy vaccine therapy - through a whole host of complex immunologic changes -- allows the body not to see pollen as an allergen. ...Read more

Benadryl (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more


Dr. Paul Carter
601 doctors shared insights

Antihistamine (Definition)

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