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Doctor insights on: Brand Name Antihistamines

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2 days of hive outbreak has gotten worse - unsure what caused it but this is not the 1st time. Been taking off-brand antihistamine to no effect. Help!

2 days of hive outbreak has gotten worse - unsure what caused it but this is not the 1st time. Been taking off-brand antihistamine to no effect. Help!

See a dermatologist: May be allergy. Maybe not. Zyrtec (cetirizine) (cetirazine) OTC 10mg. May need 2 or 3. Larger dose can make you sleepy. If severe, add prescription hydroxyzine 25mg at bedtime. If present over 6 weeks it is chronic urticaria which is usually not allergy. Avoid aspirin, alcohol. Beware of any and all pills or meds of any kind. Need precise diagnosis for best result. ...Read more

Benadryl (Definition)

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


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My ent instructions is to take antihistamine everyday .allegra Zyrtec and Claritin expensive .is the equate brand from Walmart just as strong ?

My ent instructions is to take antihistamine everyday .allegra Zyrtec and Claritin expensive .is the equate brand from Walmart just as strong ?

Likely: Generic antihistamine works just as well as the brand ones. Just look for the chemical name. Be sure that you are aiming your Flonase towards the side walls of your nose and not straight ahead also. ...Read more

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Raised lumps and extreme itching burning rash on limbs, antihistamine give some relief doc doc changed the brand of my meds. What to do now?

Raised lumps and extreme itching burning rash on limbs, antihistamine give some relief doc doc changed the brand of my meds. What to do now?

Sounds like...: Sounds like the assumption is that you're having an allergic reaction to your meds. If so, stopping it should be enough. Can take a while for your body to clear though. Continue anti-histamine. Avoid getting overheated (exertion or hot bath/shower). Can add topical steroid cream. See doctor if not better 7-10 days after change in meds. ...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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What is the best time to take an antihistamine?

What is the best time to take an antihistamine?

Any time: You can take antihistamines any time of the day.Take them same time of day everyday. ...Read more

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Can i die by taking too many antihistamine tablets?

Can i die by taking too many antihistamine tablets?

Taking lethal over: Dose would do that. Lethal overdoses of antihistamines are rare. Are you considering taking an overdose of antihistamines? If so, please get help right away. You can use national suicide hotlines 24/7 at 1-800-suicide (1-800-784-2433) or 1-800-273 – talk (1-800-273-8255). If you have accidentally taken too many antihistamines please contact 1-800-222-1222 (poison control hotline). Take care. ...Read more

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Is it possible to die from an overdose of antihistamine pills?

Is it possible to die from an overdose of antihistamine pills?

Which one: First generation antihistamines are sedating, second generation ones are not, overdosing on the latter hardly kills, but may cause sedation. Overdosing on first generation antihistamines may be more of a problem, but again they are safe in high doses. ...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?

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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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

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Is it safe to take an antihistamine daily?

Is it safe to take an antihistamine daily?

Yes but why: Although antihistamines are a very safe class of medications, the better question is why is there a need to take them daily? If antihistamines are being taken for treatment of nasal symptoms, see an allergist to identify the trigger. ...Read more

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Does an antihistamine help IC? If so how?

Does an antihistamine help IC? If so how?

IC: I commonly use anti histamine for my IC patients. Exciting histamine receptors in the bladder can stimulate inflammation. Similar responses are seen in sinus and stomach. The antihistamine therefore blocks one possible arm of the inflammatory cycle. ...Read more

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Which antihistamine dries up drainage best?

Which antihistamine dries up drainage best?

1st generation: as diphenhydramine, because of more anticholinergic effects, but would cause more sedation, read the labels well, don't drive or operate machinery while using them, if they still don't work, see your doctor for better diagnosis and management ...Read more

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Which is the best antihistamine for children?

Which is the best antihistamine for children?

Several are good: Loratedine (Alavert,Claritin), Cetirizine( Zyrtec)and Fexofenadine (Allegra)are all effective. Dyphenhydramine (Benadryl) is short acting so if you want the reaction not to come back in the middle of the night then one of the above would be better. Remember that you should not give children under 2 antihistamines without checking with your doctor. Between 2-4 y/o you should also ask. Not for colds ...Read more

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Dr. Paul Carter
630 doctors shared insights

Antihistamine (Definition)

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