U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS
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Showing 1 - 10 of 25 results

Status:
US Approved Rx (2002)
First approved in 2001

Class (Stereo):
CHEMICAL (ACHIRAL)



Desloratadine is an active, descarboethoxy metabolite of loratadine. It acts by selective inhibition of H1 histamine receptor and thus provides relief to patients with allergic rhinitis and chronic idiopathic urticaria. Desloratadine was approved by ...
Status:
US Approved Rx (1997)
First approved in 1996

Class (Stereo):
CHEMICAL (RACEMIC)



Fexofenadine is a second-generation, long lasting H1-receptor antagonist (antihistamine) which has a selective and peripheral H1-antagonist action. Histamine is a chemical that causes many of the signs that are part of allergic reactions, such as the...
Status:
US Approved Rx (2011)
First approved in 1995

Class (Stereo):
CHEMICAL (ABSOLUTE)



Levocetirizine dihydrochloride is the R enantiomer of cetirizine hydrochloride, a racemic compound with antihistaminic properties. Levocetirizine is a third-generation non-sedative antihistamine indicated for the relief of symptoms associated with se...
Status:
US Approved Rx (2018)
First approved in 1993

Class (Stereo):
CHEMICAL (ACHIRAL)



Loratadine is a derivative of azatadine and a second-generation histamine H1 receptor antagonist used in the treatment of allergic rhinitis and urticaria. Unlike most classical antihistamines (histamine H1 antagonists) it lacks central nervous system...
Status:
US Approved Rx (2008)
First approved in 1988

Class (Stereo):
CHEMICAL (RACEMIC)



Cetirizine, a human metabolite of hydroxyzine, is an antihistamine; its principal effects are mediated via selective inhibition of peripheral H1 receptors. It is indicated for the relief of nasal and non-nasal symptoms associated with seasonal or per...
Status:
US Approved Rx (1997)
First approved in 1977

Class (Stereo):
CHEMICAL (ABSOLUTE)



Clemastine is an antihistamine with anticholinergic (drying) and sedative side effects. Clemastine is a selective histamine H1 antagonist and binds to the histamine H1 receptor. This blocks the action of endogenous histamine, which subsequently leads...
Status:
US Approved Rx (2013)
First approved in 1956

Class (Stereo):
CHEMICAL (RACEMIC)



Hydroxyzine, a piperazine antihistamine structurally related to buclizine, cyclizine, and meclizine, is used to treat histamine-mediated pruritus or pruritus due to allergy, nausea and vomiting, and, in combination with an opiate agonist, anxiolytic ...
Status:
US Approved Rx (2011)
First approved in 1953

Class (Stereo):
CHEMICAL (ABSOLUTE)



Methscopolamine bromide is an anticholinergic agent used along with other medications to treat peptic ulcers by reducing stomach acid secretion. Methscopolamine is also commonly used as a drying agent, to dry up post-nasal drip, in cold, irritable bo...
Status:
US Approved OTC
First approved in 1958

Class (Stereo):
CHEMICAL (ACHIRAL)



Triprolidine is a first generation histamine H1 antagonist, which in combination with codeine phosphate and pseudoephedrine hydrochloride is sold under brand name TRIACIN-C. TRIACIN-C is indicated for temporary relief of coughs and upper respiratory...
Status:
US Approved OTC
First approved in 1958

Class (Stereo):
CHEMICAL (ABSOLUTE)


Conditions:

Dexchlorpheniramine, the d-isomer of the racemic compound chlorpheniramine, is two times more active than chlorpheniramine. Dexchlorpheniramine does not prevent the release of histamine, but rather, competes with free histamine for binding at the H1-...