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antihistamine
antihistamine
antihistamine (anti-hist-ă-meen) n. a drug that inhibits the action of histamine in the body by blocking the H
1 or H
2 receptors for histamine. When stimulated by histamine, H
1 receptors may produce such allergic reactions as hay fever, pruritus (itching), and urticaria (nettle rash). Antihistamines that block H
1 receptors (
H1-receptor antagonists) are used to relieve these conditions. Many H
1-receptor antagonists (e.g. cyclizine, promethazine) also have strong antiemetic activity and are used to prevent motion sickness. The most common side-effect of these drugs, especially the older ones (e.g. alimemazine, promethazine), is drowsiness and because of this they are sometimes used to promote sleep. Newer antihistamines (e.g. acrivastine) are less sedating. H
2 receptors are found mainly in the stomach, where stimulation by histamine causes secretion of acid gastric juice.
H2-receptor antagonists (e.g. cimetidine, famotidine, nizatidine, ranitidine) block these receptors and so reduce gastric acid secretion; they are used in the treatment of peptic ulcers and gastro-oesophageal reflux disease.
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Antihistamine Nasal Spray Effective in Reducing Symptoms of Allergies Left Untreated by Popular Oral Antihistamines; ASTELIN(R) Nasal Spray Found to Provide Symptom Relief Within 30 Minutes.
PR Newswire; 5/15/2003; 700+ words
; ...methods, oral antihistamines. In the study...using a nasal antihistamine. The study...confirms that the antihistamine nasal spray...treated with oral antihistamines." The research...generation oral antihistamines. In fact, a...than one oral antihistamine for their allergy...
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Antihistamines.(Brief Article)
Magazine article from: Family Practice News; 6/15/2001; ; 700+ words
; ...generation antihistamines. During the...best to avoid antihistamines. If an antihistamine is indicated...generation antihistamine during the last...babies exposed to antihistamines in utero. All...
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Experts warn of problematic antihistamine use.
Newspaper article from: Immunotherapy Weekly; 6/18/2003; 700+ words
; ...impairing, second-generation antihistamines instead of older, first...some second-generation antihistamines produce varying levels of...selecting second-generation antihistamines for their patients. "Our...is a true non-sedating antihistamine that has also been shown...
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Occasional Antihistamines Safe in Pregnancy.
Magazine article from: Internal Medicine News; 7/1/2001; ; 700+ words
; ...generation antihistamines. During the...best to avoid antihistamines. But if an antihistamine is indicated...generation antihistamine during the last...babies exposed to antihistamines in utero. All...
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Experts Warn of Problematic Antihistamine Use; New Recommendations Urge Doctors to Educate Patients about Impairing Side Effects.
PR Newswire; 5/14/2003; 700+ words
; ...impairing, second-generation antihistamines instead of older, first...some second-generation antihistamines produce varying levels of...selecting second-generation antihistamines for their patients. "Our...is a true non-sedating antihistamine that has also been shown...
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How to take your medicine: antihistamines.
Magazine article from: FDA Consumer; 9/1/1990; 700+ words
; How to Take Your Medicine Antihistamines Antihistamines work by temporarily blocking the action of a substance...anesthetics and can produce sedation. The reason why some antihistamines are effective against motion sickness and some symptoms...
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Most antihistamines cause some cognitive impairment.(Atopic Dermatitis)
Magazine article from: Skin & Allergy News; 9/1/2008; ; 700+ words
; ...more sedating" antihistamines, which bind to 50...first-generation antihistamines belong in the more...the most sedating antihistamine ever made." He...experience quantifiable antihistamine-induced impairment...second-generation antihistamines when prescribed at...
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 "News-Sun, The (Waukegan, IL)")
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SIDE EFFECTS MAKE OLD ANTIHISTAMINES LOOK BAD
Newspaper article from: News-Sun, The (Waukegan, IL); 1/14/1998; 700+ words
; ...they took sedating antihistamines while in school...who took a sedating antihistamine; and children with...also has studied antihistamines and learning...compared sedating antihistamines to the newer drugs...taken the sedating antihistamine, they, as a group...
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Corticosteroids, antihistamines no use in AOM.(Infectious Diseases)(acute otitis media)
Magazine article from: Pediatric News; 9/1/2006; ; 700+ words
; ...corticosteroids and antihistamines alone or in combination...one placebo plus antihistamine, and some received...Patients receiving antihistamine alone experienced...and patients taking antihistamine and corticosteroid...conclusion was that antihistamines actually prolong...
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ACAAI: Sedating antihistamine may double risk of serious injury.
Newspaper article from: Drug Week; 11/1/2002; 700+ words
; ...patients whose initial antihistamine prescription was...patients whose initial antihistamine prescription was...loratadine. "Sedation by antihistamines is governed by dose...third-generation antihistamines (azelastine, cetirizine...However, no antihistamine preparation is completely...
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Antihistamines
Encyclopedia entry from: The Gale Encyclopedia of Science
...severe. Antihistamine creams and...itching. Some antihistamines are also...benefit of antihistamines comes with...cautionary. Some antihistamine products...another type of antihistamine may help. The antihistamines Seldane and...
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Antihistamine
Book article from: Medical Discoveries
Antihistamine Antihistamines are drugs...produce a usable antihistamine. He succeeded...synthesis of antihistamines. In further...function for antihistamines was discovered...patient took an antihistamine called Dramamine...
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Allergy Relief: The Antihistamines
Book article from: American Decades
...ALLERGY RELIEF: THE ANTIHISTAMINES Allergy Miseries...until the 1940s. Antihistamine In the allergic individual...1940s searched for antihistamine compounds which would...developed an effective antihistamine with a fifty-letter...
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antihistamine
Book article from: A Dictionary of Nursing
antihistamine (anti- hist -ă-meen...and urticaria (nettle rash). Antihistamines that block H 1 receptors ( H 1...sometimes used to promote sleep. Newer antihistamines (e.g. acrivastine) are less...
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Allergies
Book article from: World of Microbiology and Immunology
...treatments and medicines, the use of antihistamines helps to relieve some of the symptoms...the allergen at regular intervals. Antihistamines, which are now prescribed and sold...There are a number of different antihistamines, and they either inhibit the production...
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