Doctor insights on:
What will happen to the antihistamine, if histamine is not even presentreaction what will my body do with that antihistamine?
Say again: Try again, Joe. What is your question? ...Read more
Can I take expectorant+antihistamine combi cough syrup? Aren't the actions contradictory? Expectorant increasing & anti-histamine drying secretions?
Do histamines (not antihistamine medications) make you drowsy? Antihistamines (no decongestants added) seem to make me more alert when allergies flare
Yes: Histamine is a substance released during an allergic attack and can cause drowsiness. Some of the older generation anti-histamine agents (like benedryl) can cause drowsiness because they can pass the "blood brain" barrier and cause a direct effect on thinking. In rare cases in adults, antihistamines can cause agitation. ...Read more
Zantac (ranitidine) has histamine ingredients. I'm taking it recently. Noticed some inverse effect, my hives is not popping out too! It should be antihistamine right?
Zantac (ranitidine): Is an antihistamine itself, it blocks H2 receptors, histamine has more than one type of receptors in the human tissues. H1, blocked by the usual antihistamines, H2, plays a role in stomach acid regulation, which zantac (ranitidine) blocks. Zantac at times is used in severe allergic reactions or severe urticaria, together with H1 blockers to control symptoms, so your deduction is right ...Read more
My doctor told me I have allergic rhinitis. He gave me a shot & said it was a "histamine shot" did I hear that wrong? Or could it be an antihistamine?
Antihistamine: A possible shot would be an antihistamine shot such as Benadryl. Benadryl, however, causes drowsiness and thus is undesirable sometimes. Another shot for bad allergies is a corticosteroid shot (a steroid shot), which works in a different manner compared to how antihistamines work. ...Read more
Diphenhydramine: 300 mg/day from all sources, 50 mg in one dose q 6 hours, it is the most widely used OTC. Other OTC 2nd generation antihistamines as cetirizine, loratadine or fexofenadine have different dosing but can be taken once a day, and do not develop tolerance, as the case with diphenhydramine, with prolonged usage. Don't combine different types unless you ask a physician, wish you wellness ...Read more
Package instructions: The package instructions will give the recommended dosages for over the counter medication. Prescriptions will give the proper dosing of antihistamines and other medications. Usual dosing takes into account other medications you might be taking plus a margin of safety. When in doubt, ask your physician. ...Read more
Anti-histamines: They can be h1-receptor antagonists such as Benadryl (diphenhydramine) or periactin or loratadine. Or, h2-receptor antagonists such as tagamet or ranitidine. Or, h3/h4 receptor antagonists (experimental) such as thioperamide. Or, atypical antihistamines such as catechin. Or, others such as cromolyn. ...Read more
It depends: There are several formulations out and each is unique. Luckily, these are relatively safe drugs. Treat them with respect! ...Read more
Some can, some won't: I have had 2 yo kids develop the skill needed to handle taking a pill or tablet. Whether it is the proper dose at that age would depend on the medication. ...Read more
Many choices: There are many excellent choices for antihistamines that are effective for treating hayfever. The new generation products work well and have few side effects. These include zyrtec (cetirizine), Allegra (fexofenadine), Claritin (loratadine), Clarinex (desloratadine) and xyzal (levocetirizine). The good news is that they are available without a prescription and most are available in several forms. ...Read more
Depends: Most itchy skin rash are not mediated by histamine and thus whether it would respond to histamine or not would depend on the mechanism causing it. There is no harm in trying antihistamine even up to 4x the usual dose. The sedating ones tend to work better on itching due to sedating effect. Consult your doctor if antihistamine does not work. ...Read more
Yes: Histamine's action on the brain's histamine receptors keeps you alert. When the antihistamine enters the brain, it counteracts this stimulatory effect thereby making you drowsy. Since the 2nd generation antihistamines do not enter the brain, they are not expected to cause drowsiness. ...Read more
Allegra (fexofenadine): Allegra is an anti-histamine which, according to a detailed ingredient list, does not contain lactose. See http://www. Drugs. Com/pro/allegra. Html. I would recommend getting the name brand Allegra though instead of generic fexofenadine since some generic forms may contain lactose. ...Read more
Yes----BUT: There is no point to taking both antihistamines. Dose varies with the condition and with the person. No antihistamine is useful for itching except if there is urticaria (hives). Sedative effect with polaramine (dexchlorpheniramine maleate) means you should not drive for 8 hrs after use. ...Read more
Our child she is 14 month she get itching in her body before two months she take anti histamine drug and ant_inflammatory drugs for several times but?
Moisturizing lotion: Are there any rashes? Your child needs to do allergy test to see if your doctor can figure out what she is allergic to. Has any blood test being done to rule out other causes of itching? See your doctor to determine the cause. A moisturizing lotion will take care of itching caused by dry skin. ...Read more
Increase of effect: One or two drinks probably won't be much of an issue, because alcohol becomes a sedative/depressant after a couple of drinks. Antihistamines can be sedating and mixing the two likely will increase the effect of sedation which can impair your judgement/ability to operate machinery etc...If u do so in evening and staying home, should be safer! Be good. Just don't drink and drive. Good luck. ...Read more
No: Antihistamines are safer medications, especially the newer ones, you can take it as long as needed. Generally they are safe. ...Read more
Yes: Levocetirizine.Get a more detailed answer ›
Good for mild allerg: Antihistamines work pretty well for mild, intermittent allergies, or as a second medication in patients with more severe disease. For persistent symptoms that require daily medications, then nasal steroid sprays are superior. ...Read more
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