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Doctor insights on: Classes Of Antihistamines

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In class,at home,1-2/day ,Hives are oftenly occure on my full body ,tell me the best way to resolve this problem ,even antihistamines doesn't work .

In class,at home,1-2/day ,Hives are oftenly occure on my full body ,tell me the best way to resolve this problem ,even antihistamines doesn't work .

Larger dose: Try a non-sedating antihistamine up to 4 x daily ( yes much larger than what is used for hay fever). If this does not help. you may add a H2 antagonist such as Pepcid (famotidine) or ranitidine twice daily. If this happens only at home or at school, then there is something in that environment causing the hives. Consult an allergist if the above measures didn't help. ...Read more

Benadryl (Definition)

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


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When ever I'm not taken an antihistamine like Clariten or Zyrtec (cetirizine) and I am walking fast like to class I get extremely itchy like in my thigh region ?

When ever I'm not taken an antihistamine like Clariten or Zyrtec (cetirizine) and I am walking fast like to class I get extremely itchy like in my thigh region ?

Itchy: You might have dermatographism which is a physical urticaria from rubbing the skin. Rubbing, pressure or scratching your skin can cause a hive or wheal to develop which can be intensely itchy Your doctor can test you for this if you are not taking antihistamines at the time you are examined. Antihistamines are an effective treatment of this condition ...Read more

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I gave expired antihistamine syrup to my 30 months old son incidentally...Is it dangerous?What s the side effect on him?

I gave expired antihistamine syrup to my 30 months old son incidentally...Is it dangerous?What s the side effect on him?

Expired drugs: There should be no side effects as expiration is usually based on loss of drug effectiveness. Drug companies err on the side of shortening times to expiration. Actually many drugs are effective long after expiration dates. Expired drugs are commonly used effectively by volunteer organizations when no other drugs are available. Relax! ...Read more

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Is Flixonase an antihistamine?

Is Flixonase an antihistamine?

Steroid Nasal Spray: Flixonase or Flonase (fluticasone proprionate) is a steroid nasal spray commonly used to treat allergic rhinitis by decreasing the allergic inflammation in the nasal mucosa. It is not an antihistamine. ...Read more

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Is there an antihistamine cream?

Is there an antihistamine cream?

Yes, but avoid: Benadryl (diphenhydramine) cream is available. While some people find temporary relief for insect bites with this, in general it is not very effective compared to other antihistamines taken as pills or tabs. For generalized rash, it really doesn't make sense. ...Read more

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Does antihistamine make you drowsy?

Older ones do: First generation antihistamines (benadryl, clor-pheramine, atarax) cross the blood brain barrier and cause lethargy. Second generation (allegra, claritin, zyrtec, xyzal, (levocetirizine) clarinex) cause the blood brain barrier at a much lesser amount and more targeted to the h1 receptor. ...Read more

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Can you use antihistamine and wine?

Can you use antihistamine and wine?

Not a good idea: Antihistamines (especially the older ones such as benadryl) can cause drowsiness and impairment and this can be worsened by the effect of alcohol even at regular doses. There are other allergy medications available that can be taken if a glass of wine is desired. ...Read more

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Can antihistamines dry out your skin?

Can antihistamines dry out your skin?

not likely: Antihistamines can dry up a runny nose and older antihistamines can lead to unwanted side effects of dry eyes and dry mouth. Topical antihistamines should not be used. Oral antihistamines should not dry out the skin. ...Read more

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Is it ok to take antihistamines with ?

With what?: If you are thinking about drinking alcohol, do not do it. Antihistamines might potentiate the effect of alcohol. ...Read more

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Can you take antihistamine with codeine?

Can you take antihistamine with codeine?

Yes: There is a medication called tussionex that combines an older antihistamine (chlorpheniramine) with hydrodocone (similar to codeine). This medication is especially effective for severe irritant cough. It is important to carefully follow dosing directions. ...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