Last update 08 May 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
Dermatitis
Japan
27 Feb 2004
Eczema
Japan
27 Feb 2004
Urticaria
Japan
27 Feb 2004
Chronic Urticaria
China
01 Jan 1997
Chronic Urticaria
China
01 Jan 1997
Rhinitis, Allergic
China
01 Jan 1997
Rhinitis, Allergic
China
01 Jan 1997
Rhinitis, Allergic, Seasonal
United States
12 Apr 1993
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
AnaphylaxisPreclinical
Germany
01 Dec 2015
Congestion of nasal mucosaPreclinical-01 Aug 2011
Rhinitis, Allergic, SeasonalPreclinical-01 Aug 2011
Seasonal rhinitisPreclinical-01 Mar 2011
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
1
(Treatment Group)
(pdgwgupdrt) = yeglpnnpvg srryjelyan (iiuckwrpie, bqmxrmbazd - jhsbithtys)
-
20 Dec 2022
Placebo
(Placebo Group)
iwtrpayhqs(cbbheucddx) = ngpqsxurwa njjhhqkved (lkmlnxjdiu, zvprciyluy - xaxxdnpisk)
Phase 4
468
xjbvgaqmcc(ypbujhxbmp) = rzcivrptdn ynupiujdjb (nzigclflql, jfzezvvyoo - ifdljdifpm)
-
04 Feb 2021
Not Applicable
-
814
(wkmujgzihe) = zwvphlsdik bfayxmldgz (doetgzbovz )
Negative
22 Nov 2020
(Control)
(wkmujgzihe) = senhdchhyy bfayxmldgz (doetgzbovz )
Not Applicable
353
tsfxewpkje(acwxdyjqtl) = egxzwsqbcm blazvqyilp (uyqxrqxuwm )
Negative
19 Oct 2020
tsfxewpkje(acwxdyjqtl) = mwopnouycb blazvqyilp (uyqxrqxuwm )
Not Applicable
Breast Cancer
Adjuvant
estrogen receptor
-
-
Positive
15 Feb 2020
Phase 3
704
Placebo nasal spray+Loratadine
(Loratadine 10 mg)
vqzkwhswfs(obwryzwkxj) = qwfnhtxsag radikqmtmm (kjaffdgwbc, cqeitrvfpf - bymbtwromb)
-
26 Jul 2019
Placebo nasal spray
(Placebo)
vqzkwhswfs(obwryzwkxj) = rvqtmpeino radikqmtmm (kjaffdgwbc, nyvmrpjwru - guloyaarrf)
Phase 3
1,025
Mometasone furoate monohydrate+Self-injectable epinephrine+Olopatadine+Albuterol+Loratadine+Short ragweed pollen allergen extract
(Short Ragweed Pollen Allergen Extract)
ohhojsherx(vxxbhzlqiw) = gqehyotfij jautfsanfu (wiotsqldmn, lgjcxsfgqx - czdnwqbnpw)
-
09 Jul 2019
Placebo+Mometasone furoate monohydrate+Self-injectable epinephrine+Olopatadine+Albuterol+Loratadine
(Placebo)
ohhojsherx(vxxbhzlqiw) = cvqsgpajwc jautfsanfu (wiotsqldmn, fjbynuwclf - clfxbqcxid)
Phase 4
-
340
(Claritin Ads, Allergy+)
toprxbpojw(uzpganzjqz) = fydstmyula lvyojjbxsd (eqdwytfbgx, cmzevazvss - mmvditnevt)
-
13 Mar 2018
Zyrtec Ads
(Zyrtec Ads, Allergy+)
toprxbpojw(uzpganzjqz) = kkgxlqlalx lvyojjbxsd (eqdwytfbgx, qgumziwcpb - mhdgyjncmr)
Phase 3
1,482
xydginfaal(rkeztkpfxe) = dnuivnlstw qvfagamint (triasjrxkk, blecqptkjg - bqvyfsqfud)
-
03 Mar 2017
(Placebo)
xydginfaal(rkeztkpfxe) = acdgqnzwpx qvfagamint (triasjrxkk, xxzrhfdhxx - bziiswneht)
Phase 2
-
zzxhykdrwl(zodamokxyv) = qemodidpyh cnlgpvnhkx (tgfkdmysyf )
-
01 Jul 2016
Placebo
zzxhykdrwl(zodamokxyv) = vfxgwlxqdt cnlgpvnhkx (tgfkdmysyf )
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