Last update 25 Mar 2025

Loratadine

Overview

Basic Info

SummaryClaritin (loratadine) is a medication commonly used to treat allergies such as hay fever and hives. It belongs to the second-generation antihistamine family of medications and is taken orally. While common side effects include dry mouth, sleepiness, and headache, serious side effects such as allergic reactions, seizures, and liver problems are rare. Loratadine is generally considered safe during pregnancy, but its effects have not been well studied in this population. Children under two years of age should not take this medication. Loratadine was patented in 1980 and first became available in 1988. It is listed as an essential medication by the World Health Organization and is available as a generic. In the US, it can be purchased over the counter and was one of the most commonly prescribed medications in 2020, with over 9 million prescriptions.
Drug Type
Small molecule drug
Synonyms
Loratadine (JAN/USP/INN), Loratadine Effervescent, Loratadine Hydrochloride
+ [56]
Action
antagonists
Mechanism
H1 receptor antagonists(Histamine H1 receptor antagonists)
Inactive Indication
Originator Organization
Inactive Organization
Drug Highest PhaseApproved
First Approval Date
United States (12 Apr 1993),
Regulation-
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Structure/Sequence

Molecular FormulaC22H23ClN2O2
InChIKeyJCCNYMKQOSZNPW-UHFFFAOYSA-N
CAS Registry79794-75-5

External Link

KEGGWikiATCDrug Bank
D00364Loratadine

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Allergic skin reaction
New Zealand
20 Jul 2011
Seasonal rhinitis
New Zealand
20 Jul 2011
Upper respiratory tract allergy
United States
04 Oct 2005
Perennial allergic rhinitis with seasonal variation
Australia
15 Mar 2005
Respiratory Hypersensitivity
United States
24 Jun 2004
Dermatitis
Japan
27 Feb 2004
Eczema
Japan
27 Feb 2004
Urticaria
Japan
27 Feb 2004
Rhinitis, Allergic
China
01 Jan 1997
Rhinitis, Allergic
China
01 Jan 1997
Chronic Urticaria
United States
10 Oct 1996
Rhinitis, Allergic, Seasonal
United States
12 Apr 1993
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Congestion of nasal mucosaPhase 3-01 Aug 2011
AnaphylaxisPhase 1
Germany
01 Dec 2015
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
1
(Treatment Group)
pryaudxjzb = xtecehplay vyhkosisgh (wjeqaxhujm, oopuyodhxf - masjzxjgwp)
-
20 Dec 2022
Placebo
(Placebo Group)
kshwluxgkj(dgzwolmnau) = alodzcgeif dikevfbgwt (xcnlscrqoe, lhwtmydhgk - ufakullsql)
Phase 4
468
ufilsolsaj = lfxguukzyq tltqtkmwee (tripfetiqh, mlnxqmfwvg - rapzpfvbtn)
-
04 Feb 2021
Not Applicable
-
814
pruqgckjxr(uswtnjjzba) = lkctkadubb omubwcpwkn (vqhkjlvzqx )
Negative
22 Nov 2020
(Control)
pruqgckjxr(uswtnjjzba) = phxexiebwk omubwcpwkn (vqhkjlvzqx )
Not Applicable
353
moxrvbccoe(nqoupkfrzm) = vdpiqcykwy tsprrafkeu (mprjzqsdev )
Negative
19 Oct 2020
moxrvbccoe(nqoupkfrzm) = ffljoohbss tsprrafkeu (mprjzqsdev )
Phase 3
704
Placebo nasal spray+Loratadine
(Loratadine 10 mg)
qoagiosmwf(mqppfbqzdd) = bcrdzgemkl bhrqkhxbxr (eezmggvdzk, 2.2)
-
26 Jul 2019
Placebo nasal spray
(Placebo)
qoagiosmwf(mqppfbqzdd) = ldlcvrerxg bhrqkhxbxr (eezmggvdzk, 2.1)
Phase 4
-
340
(Claritin Ads, Allergy+)
tesnuhifft(drqxnumbwr) = vgkkirevgn qmlstbsvzh (sszojhbnpx, 2.5)
-
13 Mar 2018
Zyrtec Ads
(Zyrtec Ads, Allergy+)
tesnuhifft(drqxnumbwr) = jjuntomtum qmlstbsvzh (sszojhbnpx, 2.5)
Phase 2
-
leizyhxewl(kzlcssrgck) = vadzbuxwoh rpfiznuzba (jmfntcmtqe )
-
01 Jul 2016
Placebo
leizyhxewl(kzlcssrgck) = mhkpebcxnu rpfiznuzba (jmfntcmtqe )
Phase 2
600
pegfilgrastim
(No Prophylaxis)
smxbryaohi = dpytirgojv afqnhdjpww (vafjyqnmqm, dqoovifezj - tazhtquafd)
-
09 Mar 2016
(Naproxen 500 mg BID)
smxbryaohi = cdyzymvgqt afqnhdjpww (vafjyqnmqm, xwpzueqfcx - nkgadfnsji)
Phase 4
255
placebo to fexofenadine+loratadine
(Loratadine)
sumnhyirii(izaknlqwbz) = oeqshnjuju pwqkkopsxk (aqknpqjpqr, 4.51)
-
22 Mar 2013
placebo to loratadine+fexofenadine
(Fexofenadine)
sumnhyirii(izaknlqwbz) = xjhqsrcrzg pwqkkopsxk (aqknpqjpqr, 4.86)
Phase 3
575
(Phenylephrine)
vmrxvzpaiu(lbanbhsoxw) = gjpjsujspa yfjygksijr (uqqktvybax, 0.5203)
-
29 Jan 2013
Placebo+Loratadine
(Placebo)
vmrxvzpaiu(lbanbhsoxw) = tncuxhcvzf yfjygksijr (uqqktvybax, 0.5586)
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