Desloratadine

Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026

Desloratadine is a second-generation H1 antihistamine used for seasonal allergic rhinitis, perennial allergic rhinitis, and chronic idiopathic urticaria. It is typically non-sedating at recommended doses, but fatigue, dry mouth, and somnolence can still occur, and dose adjustment is used in adult renal or hepatic impairment.

Exploratory record, not a reviewed medical publication.

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This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.

In short

What the research says.

A quick, data-only summary. The full evidence, dosing, and sources are below.

Desloratadine is a second-generation H1 antihistamine used for seasonal allergic rhinitis, perennial allergic rhinitis, and chronic idiopathic urticaria. NutriStack rates the supporting evidence as strong. Common adult dosing is Adults and adolescents: 5 mg orally once daily. Adults with hepatic or renal impairment are commonly dosed 5 mg every other day depending on product labeling., though a prescriber sets the actual dose. This profile indexes 3 sources.

What it's good for

Relief of seasonal allergic rhinitis symptoms^2,3
Relief of perennial allergic rhinitis symptoms^2,3
Reduction of hives and itch in chronic idiopathic urticaria^1,3

What to watch for

Pharyngitis
Dry mouth
Fatigue
Known hypersensitivity to desloratadine, loratadine, or formulation components^3,1
Use caution and adjust adult dosing in significant hepatic or renal impairment³

The bottom line

Evidence rating strong. Most-documented uses: relief of seasonal allergic rhinitis symptoms, relief of perennial allergic rhinitis symptoms, reduction of hives and itch in chronic idiopathic urticaria. 3 sources indexed (2001–2026), with 0 interaction records on file.

The science

How it works, mechanistically.

Core mechanism

Desloratadine is the active metabolite of loratadine and selectively blocks peripheral H1 receptors. By reducing histamine signaling it decreases sneezing, rhinorrhea, itching, tearing, and urticarial wheals. Limited central nervous system penetration explains the lower sedation burden compared with first-generation antihistamines.^1,3

Class

Second-generation H1 antihistamine

Dosing

Dosing & protocol.

Common range

Adults and adolescents: 5 mg orally once daily. Adults with hepatic or renal impairment are commonly dosed 5 mg every other day depending on product labeling.

Recommended form

Oral tablet, orally disintegrating tablet, or syrup depending on age and swallowing needs

May be taken with or without food. Avoid adding sedating products if fatigue or somnolence occurs.

Safety

Full safety detail.

Side effects

Pharyngitis
Dry mouth
Fatigue
Somnolence
Myalgia
Headache
Dysmenorrhea
Hypersensitivity reactions rarely

Contraindications

Known hypersensitivity to desloratadine, loratadine, or formulation components^3,1
Use caution and adjust adult dosing in significant hepatic or renal impairment³
Monitor for somnolence when combined with sedating agents²

Sources

Sources, by evidence tier.

Numbered references. Citations throughout the page link here.

Randomized controlled trials

1Desloratadine therapy for symptoms associated with chronic idiopathic urticariaRing J et al. · International Journal of Dermatology · 2001
Controlled trials support reduced pruritus and urticaria symptoms with desloratadine.

Reviews & position papers

2Allergic Rhinitis and its Impact on Asthma guidelinesBousquet J et al. · Journal of Allergy and Clinical Immunology · 2020
Guidelines support second-generation antihistamines for rhinitis symptom relief.

Reference material

3Desloratadine Tablets US Prescribing InformationURLU.S. National Library of Medicine · DailyMed · 2026
Labeling describes 5 mg daily dosing, hypersensitivity contraindication, adverse reactions, and adult renal or hepatic impairment dosing.

FAQ

Common questions.

Quick answers about Desloratadine, drawn from the data on this page.

What is Desloratadine?

What is Desloratadine used for?

Commonly cited benefits of Desloratadine include: Relief of seasonal allergic rhinitis symptoms; Relief of perennial allergic rhinitis symptoms; Reduction of hives and itch in chronic idiopathic urticaria. NutriStack rates the overall evidence as strong.

What is a typical dose of Desloratadine?

A typical adult dose of Desloratadine is Adults and adolescents: 5 mg orally once daily. Adults with hepatic or renal impairment are commonly dosed 5 mg every other day depending on product labeling.. The commonly recommended form is Oral tablet, orally disintegrating tablet, or syrup depending on age and swallowing needs. These are general ranges, not personalized advice; confirm the right dose with a clinician.

What are the side effects of Desloratadine?

Reported side effects include pharyngitis, dry mouth, fatigue, somnolence, myalgia, headache. This is educational information; check with a healthcare professional before use.

How strong is the evidence for Desloratadine?

NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.

Use this with your stack

Desloratadine in NutriStack.

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