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Doctor insights on: History Of Antihistamines

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Systemic rash onset 3days ago, most body parts swollen sometimes even painful, antihistamine for 2days& not improved,no prev history or sth suspicious

Systemic rash onset 3days ago, most body parts swollen sometimes even painful, antihistamine for 2days& not improved,no prev history or sth suspicious

Several questions?: Is it related to foods or medications? Is it the first time? Did you have any difficulty in breathing? At any rate, you need to see your doctor as you may well need another medication and possibly low potency steroids for a short period, good luck ...Read more

Benadryl (Definition)

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


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What can cause huge itchy hives that last for 2 days? Responds to antihistamine but returns hours later. No known allergies but strong family history.

What can cause huge itchy hives that last for 2 days? Responds to antihistamine but returns hours later. No known allergies but strong family history.

Acute Urticaria/Hive: Acute urticaria (hives) is common, affecting 20% of the population. Acute hives resolve within 6 weeks (most patients fit into this category). Hives can become chronic if last more than 6 weeks. Common viral/bacterial infections can trigger an outbreak, however medications, foods, and stings can also cause acute hives but have the potential to lead to more serious complications. See Allergist ...Read more

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35 year old female (history of Crohn's disease) with new facial flushing. Never happened before. No new meds, foods or skin products. Antihistamines and cold compresses not helping.

35 year old female (history of Crohn's disease) with new facial flushing. Never happened before. No new meds, foods or skin products. Antihistamines and cold compresses not helping.

Unusual: Based on the info you provided, it's hard to say exactly what it is. If you are having any belly pain, i would be concerned that your flushing could be related to an evolving crohn's infection or fistula. Other ideas include an allergy, or even more rarely would be a type of a tumor called a neuroendocrine cancer. Make an appointment to discuss with your doctor. ...Read more

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Turbinate hypertrophy swollen all day everyday & can't breathe. Otc antihistamine or singulair (montelukast) better? What are the causes? No history of allergies.

Turbinate hypertrophy swollen all day everyday & can't breathe. Otc antihistamine  or singulair (montelukast) better? What are the causes? No history of allergies.

Many: If you really have turbinate hypertrophy and it has been proven not to be related to allergy, then vasomotor rhinitis and hyperplastic rhinitis come to mind. Have your considered seeing an allergist? Have you tried nasal steroid and nasal antihistamine? Antihistamine alone does not decongest the nose. ...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 are the common uses of antihistamine?

What are the common uses of antihistamine?

Antihistamine 4 itch: Antihistamines (ah) block histamine receptors and stop histamine from causing itching and swelling. They are mainly used to treat allergies and hives. Some are sedating; those are used as sleep aids. Many otc sleep meds contain Diphenhydramine (benadryl). ...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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Is it ok to take antihistamines with ?

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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How long do antihistamines stay in your system?

72 hrs: The biologic effects no longer than 72 hours even though the drug may still be detectable for up to a couple of weeks with certain antihistamines. ...Read more

Dr. Paul Carter
630 doctors shared insights

Antihistamine (Definition)

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