Comprehensive medication guide to Desloratadine including estimated pricing, availability information, side effects, and how to find it in stock at your local pharmacy.
Estimated Insurance Pricing
$5–$30 copay for generic Desloratadine on Tier 1–2 plans; brand Clarinex may require prior authorization and can fall on Tier 3 or higher with higher cost-sharing.
Estimated Cash Pricing
$80–$166 retail for generic Desloratadine; as low as $13–$19 with GoodRx or SingleCare coupons for a 30-day supply. Brand-name Clarinex costs $150–$338 without insurance.
Medfinder Findability Score
45/100
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Desloratadine is a prescription second-generation antihistamine sold under the brand name Clarinex. It was first approved by the FDA in 2001 and is used to treat seasonal and year-round allergic rhinitis (hay fever) and chronic idiopathic urticaria (chronic hives). It is the active metabolite of Loratadine (Claritin), meaning it is the compound your body naturally converts Loratadine into after you take it.
Unlike Loratadine, Cetirizine (Zyrtec), and Fexofenadine (Allegra), Desloratadine requires a prescription in the United States — it is not available over the counter. This prescription-only status is one of the key reasons it can be harder to find at pharmacies. Generic Desloratadine is available and is FDA-approved as therapeutically equivalent to brand Clarinex.
Desloratadine is approved for adults and children as young as 6 months of age. It comes in 5 mg film-coated tablets (the most commonly available form), orally disintegrating tablets, and an oral solution — though the RediTabs and oral solution brand formulations have been discontinued.
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Desloratadine is a long-acting, selective H1 histamine receptor antagonist. When your immune system detects an allergen (pollen, pet dander, dust mites), it triggers mast cells to release histamine. Histamine then binds to H1 receptors throughout your body — in your nasal membranes, eyes, skin, and airways — causing the sneezing, runny nose, itchy eyes, and hives associated with allergic reactions.
Desloratadine blocks H1 receptors, preventing histamine from binding and triggering these symptoms. It shows significant H1 receptor interaction at plasma concentrations of just 2-3 ng/mL, providing effective relief with once-daily dosing. It also inhibits histamine release from mast cells directly, adding a second layer of antihistaminic action.
Unlike older antihistamines (such as Benadryl), Desloratadine does not readily cross the blood-brain barrier. This means it primarily acts on peripheral H1 receptors in the body — not the brain's wake-promoting circuits — which is why it causes minimal to no sedation at the recommended 5 mg dose.
5 mg — tablet
Standard adult and adolescent (12+) dose. Film-coated tablet, once daily with or without food.
2.5 mg — orally disintegrating tablet
Standard dose for children 6-11 years. Place on tongue and let dissolve. Brand RediTabs discontinued; generic ODT may be available.
1.25 mg — oral solution
Dose for children 6 months to 5 years (oral solution, 0.5 mg/mL). Brand oral solution discontinued; some generic forms may be available.
Desloratadine is not on the FDA or ASHP shortage list as of 2026, but many patients report difficulty finding it at local pharmacies. The drug is genuinely hard to find at chain pharmacies — not because of a manufacturing shortage, but because its prescription-only status results in low demand relative to OTC competitors, and chain pharmacies simply don't stock low-volume prescription items.
Additional availability challenges include discontinued formulations (Clarinex RediTabs and Oral Solution are no longer marketed) and insurance step therapy requirements that discourage prescribing. Independent pharmacies and mail-order pharmacies generally have better availability.
The easiest way to find Desloratadine near you is to use medfinder — medfinder calls pharmacies in your area and texts you which ones have your prescription in stock, saving you hours of phone calls.
Desloratadine is not a controlled substance and has no DEA scheduling requirements. Any licensed prescriber with standard prescribing authority can write a prescription. There are no special registration requirements, quantity limits, or prescribing restrictions beyond standard state licensure.
Allergists and Immunologists — specialists for complex or severe allergic rhinitis and chronic urticaria
Primary Care Physicians (Family Medicine, Internal Medicine) — most common prescribers for seasonal and perennial allergic rhinitis
Pediatricians — appropriate for pediatric patients from 6 months of age
ENT / Otolaryngologists — often prescribe for allergic rhinitis associated with sinusitis or nasal symptoms
Nurse Practitioners (NPs) and Physician Assistants (PAs) — licensed to prescribe in most states independently
Dermatologists — may prescribe for chronic urticaria (hives) as part of skin condition management
Telehealth is a convenient option for obtaining a Desloratadine prescription. Because it is not a controlled substance, telehealth providers can prescribe it after a brief virtual consultation — often same day. This is especially useful for prescription renewals, new allergy symptoms during peak season, or patients who cannot easily access in-person care.
No. Desloratadine (Clarinex) is not a controlled substance and is not listed in any DEA schedule. It has no known abuse potential and does not require any special DEA prescribing registration to prescribe or dispense.
However, Desloratadine does require a valid prescription from a licensed healthcare provider in the United States — it is not available over the counter. Any licensed prescriber (primary care physician, allergist, NP, PA, pediatrician, etc.) can write a prescription for Desloratadine without special restrictions. There are no federal limitations on prescription quantity or refills based on controlled substance status, though individual insurance plans may have their own quantity limits.
Desloratadine is generally well tolerated. In clinical trials, adverse event rates were similar to placebo. The following side effects occurred in ≥2% of patients and were more frequent than placebo:
Headache (14%)
Nausea (5%)
Fatigue (5%)
Dizziness (4%)
Pharyngitis / sore throat (3%)
Dyspepsia / indigestion (3%)
Myalgia / muscle pain (3%)
Dry mouth (post-marketing)
Hypersensitivity reactions: rash, pruritus, urticaria, edema, dyspnea, anaphylaxis — stop medication immediately and seek emergency care
Tachycardia: rare, reported post-marketing
Elevated liver enzymes / hepatitis: very rare
Movement disorders / seizures: rare, reported post-marketing
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Loratadine (Claritin)
OTC parent drug of Desloratadine; 10 mg once daily for adults; very low sedation; $3-$8/month generic. Closest pharmacologic equivalent to Desloratadine.
Cetirizine (Zyrtec)
OTC; 10 mg once daily; slightly higher sedation rate (~10-15%); may be more effective for urticaria; $3-$8/month generic.
Fexofenadine (Allegra)
OTC; 180 mg once daily; least sedating antihistamine available; no QTc concerns; avoid with fruit juice; $5-$15/month generic.
Levocetirizine (Xyzal)
OTC; 5 mg once daily; active R-enantiomer of Cetirizine; slightly higher sedation; effective at lower dose; $5-$12/month generic.
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Ketoconazole
moderateIncreases plasma concentrations of Desloratadine and 3-hydroxydesloratadine. No clinically significant safety changes including QTc were reported in studies, but inform your doctor.
Erythromycin
moderateIncreases plasma concentrations of Desloratadine. No clinically relevant safety changes observed in clinical studies. Inform prescriber of concurrent use.
Azithromycin
moderateIncreases plasma concentrations of Desloratadine. Similar to erythromycin — no significant safety concerns reported, but inform prescriber.
Cimetidine
moderateCoadministration resulted in increased plasma concentrations of Desloratadine. No clinically relevant safety changes. Inform prescriber.
Diphenhydramine (Benadryl)
moderateCombining with other antihistamines may increase sedation and anticholinergic effects. No therapeutic benefit to combining antihistamines.
Alcohol
minorNo direct pharmacokinetic interaction, but alcohol's own sedative effects may be additive with antihistamines. Use with caution.
Fluoxetine
minorMinor potential interaction via shared metabolic pathways. Inform prescriber of concurrent use. Clinical significance appears low.
Desloratadine (Clarinex) is a highly effective, well-tolerated antihistamine for seasonal and perennial allergic rhinitis and chronic urticaria. Its prescription-only status, low sedation profile, and absence of QTc effects make it a valuable option for select patients — particularly those who need a prescription-grade antihistamine with minimal drowsiness and fewer certain drug interactions than its parent drug Loratadine.
The key challenges are availability and cost. Desloratadine is harder to find at local pharmacies than OTC antihistamines due to low prescription volume and discontinued formulations. The cash price can be high without insurance or discount programs, but generic Desloratadine can be as low as $13/month with SingleCare or GoodRx coupons. For uninsured patients, the Organon Patient Assistance Program (organonhelps.com) may provide it for free.
If you need help finding Desloratadine in stock near you, medfinder calls pharmacies on your behalf and texts you the results — a simple, effective way to avoid wasted trips and frustrating phone hold times.
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Medfinder is actively checking pharmacy inventory for Desloratadine. We don't publish a number until we have enough verified pharmacy checks to be accurate — start a search and our team confirms current availability near you, usually within 24 hours.
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