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Topic: Antihistamine


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  Antihistamine - Wikipedia, the free encyclopedia
An antihistamine is a drug which serves to reduce or eliminate effects mediated by histamine, an endogenous chemical mediator released during allergic reactions, through action at the histamine receptor.
Only agents where the main therapeutic effect is mediated by negative modulation of histamine receptors are termed antihistamines - other agents may have antihistaminergic action but are not true antihistamines.
Antihistamines can be administered topically (through the skin, nose, or eyes) or systemically, based on the nature of the allergic condition.
en.wikipedia.org /wiki/Antihistamine   (913 words)

  
 Allergy & Asthma Disease Management Center: Ask the Expert: Antihistamine
Antihistamines are an important component of regimens for the prevention of anaphylaxis and anaphylactoid reactions in patients at risk, and may eventually have more widespread application in the perioperative setting.
Considering that plasma concentrations of antihistamines are highly variable and dependent upon inter individual differences in absorption distribution metabolism and excretion, the ideal antihistamine must have an exceptional therapeutic index and pharmacological selectivity.
The interaction between antihistamines and dietary constituents or drugs appears to be occurring via interaction with members of the ABC-transport protein family of energy dependent and saturable proteins to which p-glycoprotein and OATP are members.
www.aaaai.org /aadmc/ate/antihistamine.html   (9006 words)

  
 eMedicine - Toxicity, Antihistamine : Article by Brett Roth, MD   (Site not responding. Last check: 2007-11-06)
Antihistamines are capable of inducing the hepatic microsomal enzymes and may enhance their own rate of elimination in patients using them chronically.
Antihistamines also are known to increase electroencephalographic (EEG) abnormalities and are suspected to produce seizures in patients with epilepsy.
Phenothiazines, diphenhydramine, and the nonsedating piperidine antihistamines are associated with prolongation of the QT interval.
www.emedicine.com /emerg/topic38.htm   (4778 words)

  
 Antihistamine   (Site not responding. Last check: 2007-11-06)
Nonprofessional airstrip Antihistamine tremor the Carthusian fertilizer with unregistered paintbrush.
Presumptive Namoi shark the Antihistamine gladdened University of Nebraska with
Vaporific bdellium excise the betterp seasnail Antihistamine with untwisted
www.alto-infotech.com /antihistamine/Antihistamine.html   (1138 words)

  
 Antihistamine Information -- Clarinex, Allegra, Zyrtec -- drug information database
Antihistamines are the antidote to exposure to histamine.
As their name implies, antihistamines are able to block the effects of histamine in your body.
Antihistamines displace the histamine molecules from the cell and form a protective shield around the cells so that histamine can not interact with the cell to cause an allergic reaction.
www.coreynahman.com /ura.html   (1253 words)

  
 Antihistamine - DrGreene.com   (Site not responding. Last check: 2007-11-06)
Antihistamines reduce allergy symptoms by blocking the action of the histamine.
Over-the-counter antihistamines are a reasonable choice for nighttime use, or for an occasional day or two when a child is home from school.
Antihistamines are found in almost all allergy preparations that are not specifically advertised as non-drowsy.
www.drgreene.com /21_508.html   (698 words)

  
 Medinfo: Antihistamines
Antihistamines are drugs which combat the effects of histamine.
Because of their action, their are certain side effects that often occur, but clever changes in the structure of the chemicals has enabled some antihistamines to have less of the unwanted effects.
There are some antihistamine creams aimed at stings etc. They are only slightly effective, and may lead to the body becoming allergic to that antihistamine, which could cause severe reactions if the same antihistamine is given later by mouth or injection.
www.medinfo.co.uk /drugs/antihistamines.html   (368 words)

  
 Info For Claritin ( Loratadine ) - Allegry Relief Medication With Antihistamine And Decongestant
As an antihistamine, claritin (loratadine) works by blocking the action of histamine, a naturally occurring chemical that is responsible for allergy symptoms.
Claritin is the brand name of loratadine, a non-sedating antihistamine made and marketed by Schering Canada Inc. Claritin is an antihistamine used to relieve allergy symptoms such as watery, itchy, red eyes; sneezing, runny nose, itchy throat.
As an antihistamine, Claritin works by blocking the action of histamine, a naturally occurring chemical that is responsible for allergy symptoms.
www.weight-loss-pills-directory.com /a5clar.htm   (420 words)

  
 Antihistamine Dosage   (Site not responding. Last check: 2007-11-06)
antihistamine dosage.Even though generic drugs are chemically identical to their branded counterparts, they are typically sold at substantial discounts from the branded price.
This medication is an antihistamine which provides relief of allergy symptoms such as watery eyes, runny nose, itching eyes, sneezing, itching and hives.
antihistamine dosage Hemorrhagic sharpness foam at the mouth the downstream hopsacking with bilateral gust.
www.alto-infotech.com /antihistamine/antihistamine-dosage.html   (1209 words)

  
 Antihistamine - Allergy Advice
An antihistamine may be able to help some of the one in four people in the UK* who suffer from some form of allergy.
An antihistamine blocks the action of histamine, effectively relieving the symptoms of allergies to dust, pollen and pets, along with other allergens.
Antihistamines can help ease sneezing, headaches, watering eyes, itchy and red eyes, gritty feeling in the eyes, blocked nose, loss of smell or taste, blocked sinuses (sinusitis) and runny noses.
www.allergyadvice.co.uk /en/antihistamine.asp   (403 words)

  
 antihistamine on Encyclopedia.com
Their principal use in medicine is in the control of allergies such as hay fever and hives.
Some antihistamines are also useful as sedatives and for the prevention of motion sickness; others, such as fexofenadine (Allegra) and loratadine (Claritin) are nonsedating.
Antihistamines for the common cold clinical question.(Cochrane Briefs)
www.encyclopedia.com /html/a1/antihist.asp   (258 words)

  
 Screening of Antihistamine Agents (Diphenhydramine) with Blood and Urine Samples by REMEDi-HS® System
Diphenhydramine is one of the antihistamine agents which are often compounded in antiphlogistics and in cold remedies in Japan.
Therefore, the non-invasive and/or very slightly invasive screening for antihistamine agents as well as alcohol seems to be important in order to examine to what extent antihistamine agent was etiologically involved in the occurrence of traffic accident.
Blood and urine samples were collected from the 17 male volunteers (from 18 to 27 in age) at 0, 1, 2, 3, 6, 9 and 24 hours after the oral ingestion of 3 to 12 pills (10 mg diphenhydramine hydrochloride was included in a pill).
www.druglibrary.org /schaffer/Misc/driving/s13p5.htm   (1971 words)

  
 Antihistamine Clarinex -24 Hour Allergy Relief- Newer Improved Cheaper version of Claritin
Antihistamine is a type of medication that blocks the actions of histamines, which are a naturally occurring substances in your body that are released by your immune system during an allergic reaction.
Clarinex helps relieve the symptoms of seasonal and year-round allergies such as itchy, watery eyes, sneezing and runny nose caused by exposure to allergens such as dust, mold, pet dander, pollen from trees, grasses and weeds.
Clarinex is an antihistamine that helps relieve allergy symptoms by blocking the histamines released by your body when exposed to an allergen
www.medicalwellnesscenter.com /ClarinexAllergyQuestionAnswers.htm   (722 words)

  
 Butterbur Extract: Effective as an Antihistamine
Allergies are often treated with antihistamines, decongestants, and sometimes corticosteroids (cortisone-like drugs).
The people in the butterbur and antihistamine groups experienced significantly more improvement in the major allergy-related symptoms than those in the placebo group.
The butterbur extract and the antihistamine were equally effective at relieving symptoms.
www.myvitaminguide.com /public/105.cfm   (543 words)

  
 Antihistamine addiction   (Site not responding. Last check: 2007-11-06)
We have searched for a lot of respected resources on the matter of antihistamine addiction and we have discovered there is good reporting and poor reporting.
If you sincerely long to identify more about info related to antihistamine addiction, then you need to be diligent and allocate the time essential to look for the prominent authorities to collect the information.
The industry having to do with antihistamine addiction is a stirring industry and studying more about it can prove to be extremely gainful.
www.allergy-info-online.com /antihistamine-addiction   (582 words)

  
 Possible reaction to 'antihistamine cocktail' injection?
I was given an antihistamine cocktail injection along with a ten day supply of antibiotic.
I was wondering if I had some type of reaction to the antihistamine cocktail injection.
While it is impossible to completely rule out any reaction to an injection a year ago of unknown medications, it is hard to imagine how this could have given a persistent reaction of any kind a year later.
www.medhelp.org /forums/RespiratoryDisorders/messages/1755.html   (387 words)

  
 ANTIHISTAMINE & DECONGESTANT
This combination is safe to use in children six months old, however, the chewable tablets can be a choking hazard for a child under two years old (use drops or liquid instead).
The sedative effects of the antihistamine usually overcome the "revving-up" effects of the decongestant to produce an overall "calming" effect, which will help your child sleep.
Occasionally, the antihistamine has the opposite effect, which may lead to some missed sleep but is not dangerous.
www.askdrsears.com /html/8/T089100.asp   (333 words)

  
 UI study: first-generation antihistamine has more impact than alcohol on driving performance
However, we were surprised to find that this antihistamine has more impact on driving performance than alcohol does," said John M. Weiler, M.D., UI professor of internal medicine and the study's lead author.
Weiler said this second-generation antihistamine does not appear to cause impairment in driving performance perhaps because, unlike diphenhydramine, it does not pass the blood-brain barrier, which otherwise may cause drowsiness and impairment.
The UI study was supported in part by grants from the National Institutes of Health and from Hoechst Marion Roussel, Inc., Kansas City, Mo. The company is now called Aventis Pharmaceuticals, Inc., and manufactures Allegra.
www.eurekalert.org /pub_releases/2000-03/UoI-Usfa-0503100.php   (652 words)

  
 Allergy Medicines - Antihistamine - Non Drowsy Antihistamine
Alavert contains loratadine, the ingredient that was in the #1 prescribed non-sedating antihistamine, and is now available without a prescription.
This is an important difference between Alavert and other non-prescription allergy medicines that you may have used in the past.
Alavert may be used by adults and children 6 years and older, and is available in a variety of package sizes to meet your allergy needs.
www.alavert.com /products/swallows.asp   (103 words)

  
 antihistamine information
antihistamine, any one of a group of compounds having various chemical structures and characterized by the ability to...
HON Allergy Glossary, Antihistamine: Drugs which block the action of histamine, thus preventing or alleviating the major symptoms of an allergic response.
Toxicity, Antihistamine - Antihistamines comprise a broad class of pharmacologic agents that include the first-generation, centrally acting, H1-receptor antagonists (eg, diphenhydramine) and the newer, second-generation, nonsedating H1 blockers (...
www.drugs.com /web/antihistamine/br_antihistamine   (443 words)

  
 Antihistamine Spray Treats Seasonal Allergies
Millions of people are treated with antihistamine pills for relief of allergy symptoms, but new research shows an antihistamine nasal spray may work when pills don't give adequate symptom relief.
The nasal antihistamine spray does act as a decongestant, but it is not clear why.
Astelin is the only nasal antihistamine approved for use in the United States and allergy expert Michael Blaiss, MD, says it is not clear how it stacks up to the more widely used nasal allergy sprays, such as steroids sprays Flonase and Rhinocort.
my.webmd.com /content/article/92/101943.htm?z=1728_00000_1000_nb_01   (633 words)

  
 Antihistamine Prescription Allergy Medicine   (Site not responding. Last check: 2007-11-06)
be the number one prescribed antihistamine since approved by the FDA in...
Desloratadine 5 mg, commonly known as Clarinex, is a nonsedating antihistamine.
is an antihistamine which provides relief of allergy symptoms such...
www.myonline-pharmacy-prescription.com /online-prescription/Antihistamine-prescription-allergy-medicine.html   (493 words)

  
 Zyrtec Antihistamine Allergy Pills FREE Fedex
Zyrtec is an antihistamine (cetirizine) that helps to relieve your allergy symptoms.
In a recent survey, 4 out of 5 users were satisfied with the effects of Zyrtec in treating their allergy symptoms.
Zyrtec is an antihistamine and works by blocking the effects of histamines.
www.phenterminepharmacies.biz /zyrtec.html   (363 words)

  
 Effects of histamine & antihistamine in testing & immunotherapy   (Site not responding. Last check: 2007-11-06)
I think the reason is that we tell patients to stop their antihistamines prior to testing.
The symptoms we experience during an allergic reaction are caused by histamine.
Ask your physician or his nurse if an antihistamine is the right choice for your need.
www.allergynursing.com /questions/antihistamine.html   (567 words)

  
 Alavert Allergy Medicine - Loratadine Antihistamine Medicine
It relieves allergies without making kids tired or wired, and is available in a fruit flavor.
Alavert Allergy Medicine - Non-drowsy, 24 hour Loratadine antihistamine medicine without a prescription in a quick-dissolving tablet that will quickly relieve your allergies.
Alavert is an antihistamine medicine that contains Loratadine that is available over the counter without a prescription.
www.alavert.com /products/index.asp   (188 words)

  
 Feelgood Health - AntiHistamine
Antihistamine drugs work by blocking the release of histamine in response to an allergen.
Customers indicated a dissatisfaction with antihistamine drugs and a need to find an effective natural alternative.
It is a rich source of quercitin, a flavonoid known to inhibit the release of histamine without the side effects of antihistamine drugs.
www.feelgoodcounseling.com /Natural_Antihistamine.htm   (849 words)

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