Look up: antihistamine

1. antihistamine
   [n] - a medicine used to treat allergies and hypersensitive reactions and colds
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. antihistamine
   Drug that controls the effect of histamine, released in an allergic reaction.
   Found on http://www.babycentre.co.uk/glossary/a/
   
   
3. Antihistamine
   Substance that opposes the action of histamine, an important mediator of allergic reactions and inflammation.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
4. Antihistamine
   A substance which blocks the action of histamine, a chemical released in the body fluids during an allergic reaction.
   Found on http://www.zirtek.co.uk/allergies.php
   
   
5. Antihistamine
   a drug that relieves an allergic reaction by stopping the effects of histamine, the substance responsible for the negative symptoms associated with the reaction
   Found on http://www.medichecks.com/glossary.cfm?l
   
   
6. Antihistamine
   Antihistamine medicine counteracts the action of histamine (a chemical released during an allergic reaction). For example loratadine, hydroxyzine.
   Found on http://www.nhs.uk/Conditions/Pages/hub.x
   
   
7. Antihistamine
   An exogenous agent that inhibits the release of histamine, the amino acid derivative that stimulates vasodilation and permeability under many circumstances, particularly tissue irritation. The most common type of antihistamine, the H1 receptor antagonist, produces many moderate side effects, and the...
   Found on http://www.swsbm.com/ManualsMM/MedHerbGl
   
   
8. antihistamine
   <pharmacology> A drug that counteracts the action of histamine. The antihistamines are of two types. The conventional ones, as those used in allergies, block the H1 histamine receptors, whereas the others block the H2 receptors. ... Synonym: antihistaminic. ... (18 Nov 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
9. antihistamine
   noun a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
10. antihistamine
    (an″te-) (an″ti-his´tә-mēn) a drug that counteracts the effects of histamine, a normal body chemical that among its actions is believed to cause the symptoms of persons who are hypersensitive to various allergens. While the term antihistamine can broadly include any agent that blo...
    Found on http://www.encyclo.co.uk/local/21001
    
    
11. antihistamine
    any of a group of synthetic drugs that selectively counteract the pharmacological effects of histamine (q.v.), following its release from certain ... [9 related articles]
    Found on http://www.britannica.com/eb/a-z/a/83
    
    
12. antihistamine
    a drug that counteracts the action of histamine. The antihistamines are of two types. The conventional ones, as those used in allergies, block the H1 histamine receptors, whereas the others block the H2 receptors. Called also antihistaminic.
    Found on http://users.ugent.be/~rvdstich/eugloss/
    
    
13. Antihistamine
    A commonly used medication that releives symptoms of sneezing, itching, runny nose and ongestion by blocking histamine receptors. Although most antihistamines are considered safe during pregnancy, you should always contact your healthcare provider before taking any medication.
    Found on http://www.pregnology.com/AZ/A/8
    
    
14. antihistamine
    antihistamine (ăn"tihis'tumēn) , any one of a group of compounds having various chemical structures and characterized by the ability to antagonize the effects of histamine. Their principal use in medicine is in the control of allergies such as hay fever and hives. Some antihistam...
    Found on http://www.infoplease.com/ce6/sci/A08042
    
    
15. antihistamine
    Any substance that counteracts the effects of histamine. Antihistamines may occur naturally or they may be synthesized. H₁ antihistamines are used to relieve allergies, alleviating symptoms such as runny nose, itching, swelling, or asthma. H₂ antihistamines suppress acid production by the stomach, and a...
    Found on http://www.talktalk.co.uk/reference/ency
    
    
16. antihistamine
    A type of drug that blocks the action of histamines, which can cause fever, itching, sneezing, a runny nose, and watery eyes. Antihistamines are used to prevent fevers in patients receiving blood transfusions and to treat allergies, coughs, and colds.
    Found on http://www.cancer.gov/dictionary?expand=