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Loratadine information


Loratadine
Clinical data
Trade namesClaritin, Claratyne, Clarityn, others
AHFS/Drugs.comMonograph
MedlinePlusa697038
License data
  • US DailyMed: Loratadine
Pregnancy
category
  • AU: B1[1]
Routes of
administration
By mouth
Drug classSecond-generation antihistamine
ATC code
  • R06AX13 (WHO)
Legal status
Legal status
  • AU: OTC
  • CA: OTC[3]
  • UK: General sales list (GSL, OTC) / Pharmacy[4]
  • US: WARNING[2]OTC / Rx-only
Pharmacokinetic data
Bioavailabilityalmost 100%
Protein binding97–99%
MetabolismLiver (CYP2D6- and 3A4-mediated)
Elimination half-life8 hours, active metabolite desloratadine 27 hours
Excretion40% as conjugated metabolites into urine
Similar amount into the feces
Identifiers
IUPAC name
  • Ethyl 4-(8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidinecarboxylate
CAS Number
  • 79794-75-5 checkY
PubChem CID
  • 3957
IUPHAR/BPS
  • 7216
DrugBank
  • DB00455 ☒N
ChemSpider
  • 3820 checkY
UNII
  • 7AJO3BO7QN
KEGG
  • D00364 checkY
ChEBI
  • CHEBI:6538 checkY
ChEMBL
  • ChEMBL998 checkY
CompTox Dashboard (EPA)
  • DTXSID2023224 Edit this at Wikidata
ECHA InfoCard100.120.122 Edit this at Wikidata
Chemical and physical data
FormulaC22H23ClN2O2
Molar mass382.89 g·mol−1
3D model (JSmol)
  • Interactive image
SMILES
  • O=C(OCC)N4CC/C(=C2/c1ccc(Cl)cc1CCc3cccnc23)CC4
InChI
  • InChI=1S/C22H23ClN2O2/c1-2-27-22(26)25-12-9-15(10-13-25)20-19-8-7-18(23)14-17(19)6-5-16-4-3-11-24-21(16)20/h3-4,7-8,11,14H,2,5-6,9-10,12-13H2,1H3 checkY
  • Key:JCCNYMKQOSZNPW-UHFFFAOYSA-N checkY
 ☒NcheckY (what is this?)  (verify)

Loratadine, sold under the brand name Claritin among others, is a medication used to treat allergies.[5] This includes allergic rhinitis (hay fever) and hives.[5] It is also available in drug combinations such as loratadine/pseudoephedrine, in which it is combined with pseudoephedrine, a nasal decongestant.[5] It is taken orally.[5]

Common side effects include sleepiness, dry mouth, and headache.[5] Serious side effects are rare and include allergic reactions, seizures, and liver problems.[6] Use during pregnancy appears to be safe but has not been well studied.[7] It is not recommended in children less than two years old.[6] It is in the second-generation antihistamine family of medication.[5]

Loratadine was patented in 1980 and came to market in 1988.[8] It is on the World Health Organization's List of Essential Medicines.[9] Loratadine is available as a generic medication.[5][10] In the United States, it is available over the counter.[5] In 2021, it was the 67th most commonly prescribed medication in the United States, with more than 9 million prescriptions.[11][12]

  1. ^ "Loratadine Use During Pregnancy". Drugs.com. 10 February 2020. Retrieved 10 April 2020.
  2. ^ "FDA-sourced list of all drugs with black box warnings (Use Download Full Results and View Query links.)". nctr-crs.fda.gov. FDA. Retrieved 22 October 2023.
  3. ^ "Claritin Allergy Product information". Health Canada. 25 April 2012. Retrieved 7 June 2022.
  4. ^ "Clarityn Allergy 10mg Tablets (P & GSL) - Patient Information Leaflet (PIL)". (emc). 30 August 2019. Archived from the original on 10 April 2020. Retrieved 10 April 2020.
  5. ^ a b c d e f g h "Loratadine". The American Society of Health-System Pharmacists. Archived from the original on 21 December 2016. Retrieved 8 December 2016.
  6. ^ a b "Clarityn Allergy 10mg Tablets (P) - Summary of Product Characteristics (SmPC) - (eMC)". www.medicines.org.uk. 7 October 2015. Archived from the original on 20 December 2016. Retrieved 13 December 2016.
  7. ^ "Loratadine Use During Pregnancy". www.drugs.com. Archived from the original on 21 December 2016. Retrieved 13 December 2016.
  8. ^ Fischer J, Ganellin CR (2006). Analogue-based Drug Discovery. John Wiley & Sons. p. 549. ISBN 9783527607495.
  9. ^ World Health Organization (2019). World Health Organization model list of essential medicines: 21st list 2019. Geneva: World Health Organization. hdl:10665/325771. WHO/MVP/EMP/IAU/2019.06. License: CC BY-NC-SA 3.0 IGO.
  10. ^ "Competitive Generic Therapy Approvals". U.S. Food and Drug Administration (FDA). 3 March 2023. Retrieved 6 March 2023.
  11. ^ "The Top 300 of 2021". ClinCalc. Retrieved 14 January 2024.
  12. ^ "Loratadine - Drug Usage Statistics". ClinCalc. Retrieved 14 January 2024.

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Loratadine

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Desloratadine

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agonist that is used to treat allergies. It is an active metabolite of loratadine. It was patented in 1984 and came into medical use in 2001. Desloratadine...

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Montelukast

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Schering-Plough and Merck sought permission to market a combined tablet with loratadine and montelukast. However, the FDA has found no benefit from a combined...

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Tricyclic

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maprotiline were first developed in the 1970s as tetracyclic antidepressants. Loratadine was introduced as a non-sedating second generation antihistamine in the...

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Fexofenadine

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histamine-induced wheal and flare to a significantly greater degree than loratadine or desloratadine, but was slightly less effective than levocetirizine...

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Decongestant

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jurisdictions for over-the-counter use Pseudoephedrine/loratadine (Claritin-D) – also an antihistamine via loratadine Amphetamine (formerly sold as Benzedrine, now...

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Antihistamine

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Levocetirizine (Xyzal) Levomepromazine (low-potency typical antipsychotic) Loratadine (Claritin) Maprotiline (tetracyclic antidepressant) Meclizine (most commonly...

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H1 antagonist

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antihistamine, see Ketotifen § Classification Levocetirizine (Xyzal) Loratadine (Claritin) Mizolastine (Mizollen) Quifenadine (Phencarol, Фенкарол) Rupatadine...

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Prodrug

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be placed on the market as a safe replacement for the original drug. Loratadine, another non-sedating antihistamine, is the prodrug of desloratadine,...

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Phenylephrine

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between the effects of phenylephrine or a placebo. Pseudoephedrine and loratadine–montelukast therapy were found to be significantly more effective than...

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Dimetapp

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an example, "Children's Dimetapp ND" is a 10 mg orally disintegrating loratadine tablet with a "cool blast" flavour additive. The same product with a "Citrus...

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Acrivastine

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been manufactured for sale in the US since 2008. Unlike cetirizine or loratadine, for which the standard dose is one tablet per day, a single acrivastine...

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Pseudoephedrine

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(also 5 mg of loratadine). Claritin-D 24 Hour (made by Bayer Healthcare) — contains 240 mg of pseudoephedrine sulfate (also 10 mg of loratadine). Codral (made...

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Azatadine

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pharmaceutical company. It was patented in 1967. It has been succeeded by both loratadine and desloratadine.: 53  and marketing approvals have been widely withdrawn...

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Cetirizine

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Second-generation antihistamines that do not cause drowsiness are fexofenadine, and loratadine. Use in pregnancy appears safe, but use during breastfeeding is not recommended...

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Levocetirizine

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1007/s00228-007-0366-5. PMID 17891537. S2CID 36218027. "Cetirizine and loratadine: minimal risk of QT prolongation". Prescrire International. 19 (105):...

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Cyproheptadine

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effectiveness but second generation antihistamines such as ketotifen and loratadine have shown equal results with fewer side effects. It is also used as a...

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Piperidine

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Desoxypipradrol Histamine 1 (H1) receptor antagonists/inverse agonists: Loratadine Histamine 3 (H3) receptor antagonists/inverse agonists: Pitolisant SERM...

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Hives

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antihistamines, with the second generation antihistamines such as fexofenadine, loratadine and cetirizine being preferred due to less risk of sedation and cognitive...

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Erythromycin

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Levothyroxine Linolenic acid: α-Linolenic acid and γ-linolenic acid LOE-908 Loratadine Lovastatin Meclizine Metacycline Methylprednisolone Metyrapone Mevastatin...

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H2 receptor antagonist

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Zhou Y, Ping Y, Tian S, Li G, Cui Y, Zheng B (2019). "The combination of loratadine with famotidine to relieve the symptoms of urinary frequency in female...

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Fenbendazole

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Levothyroxine Linolenic acid: α-Linolenic acid and γ-linolenic acid LOE-908 Loratadine Lovastatin Meclizine Metacycline Methylprednisolone Metyrapone Mevastatin...

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Ebastine

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(December 2005). "Meta-analysis of the efficacy of ebastine 20 mg compared to loratadine 10 mg and placebo in the symptomatic treatment of seasonal allergic rhinitis"...

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Standard for the Uniform Scheduling of Medicines and Poisons

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postoperative nausea and vomiting. Nonsedating antihistamines such as loratadine Nasal sprays containing decongestants or steroids The SUSMP March 2018...

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Organochlorine chemistry

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drugs, including the natural antibiotic vancomycin, the antihistamine loratadine (Claritin), the antidepressant sertraline (Zoloft), the anti-epileptic...

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Mast cell activation syndrome

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H1-antihistamines, such as cetirizine or ketotifen or fexofenadine or loratadine H2-antihistamines, such as ranitidine or famotidine Antileukotrienes,...

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Fentanyl

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Levothyroxine Linolenic acid: α-Linolenic acid and γ-linolenic acid LOE-908 Loratadine Lovastatin Meclizine Metacycline Methylprednisolone Metyrapone Mevastatin...

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Betahistine

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Flezelastine Ketotifen Latrepirdine Levocabastine Levocetirizine Linetastine Loratadine Mapinastine Mebhydrolin Mizolastine Moxastine Noberastine Octastine Olopatadine...

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Basophil

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ordinary urticaria and healthy controls: diurnal variation, influence of loratadine and prednisolone and relationship to disease activity". Clinical and Experimental...

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