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Histamine-1 Receptor Antagonist • Over-the-Counter (OTC)

Olopatadine Hydrochloride

Brand Names: Pataday Once Daily Relief, Eye Allergy Itch and Redness Relief, Olopatadine HCl, Retaine Allergy, Patanase

Audited by the DotMD AI Specialist Council • FDA DailyMed SPL: 2024-05-10 • RxNorm RxCUI 1797895 • 7 Linked .gov / PubMed Citations • Governance: Dr. Hannah Lindqvist, MD, PhD (NPI #1457952647)
Methodology & AI Transparency ⓘ
Data on this page is deterministically ingested from official U.S. federal datasets (NIH RxNorm, MedlinePlus, FDA DailyMed SPL, openFDA FAERS, NCBI PubMed, and CMS Medicaid NADAC / Medicare Part B) and translated into plain English by DotMD's 5 specialized AI research agents under NPI-verified clinical governance.
At a Glance • Plain-English Clinical Summary

Olopatadine Hydrochloride Key Takeaways

Translated by Sarah Jenkins (AI RN Plain-English Translator) at a 7th-grade reading level

89%
Patient “Worth It” (18)
$9.89
Lowest Cash / Mo
Transparent AI Research Council • Grounded on NIH / FDA / PubMed Data

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Dr. Vance (AI Pharmacology & Interaction Agent)

Olopatadine Hydrochloride Mechanism, CYP450 Pathways & DailyMed Monograph

RxCUI 1797895 • NDC 0065-8150

Olopatadine hydrochloride nasal solution (nasal spray) is indicated for the relief of the symptoms of seasonal allergic rhinitis in adults and pediatric patients 6 years of age and older. Olopatadine hydrochloride nasal solution (nasal spray) is an H 1 receptor antagonist indicated for the relief of the symptoms of seasonal allergic rhinitis in adults and pediatric patients 6 years of age and older.

12.1 Mechanism of Action Olopatadine is a histamine H 1 receptor antagonist. The antihistaminic activity of olopatadine has been documented in isolated tissues, animal models, and humans.

Following administration (2 mg/mL Solution), Olopatadine Hydrochloride achieves Estimated 67%–79% oral systemic absorption for Olopatadine Hydrochloride bioavailability and peak plasma tmax within 30 minutes (olopatadine hydrochloride) onset, governed by a Approximately 3–9 hours terminal plasma half-life for Olopatadine Hydrochloride terminal half-life through phase i/ii hepatic conjugation of olopatadine hydrochloride coupled with glomerular and tubular renal excretion.

Before initiating Olopatadine Hydrochloride at 2 mg/mL Solution, clinical safety checklists rule out prior anaphylaxis, angioedema, or severe hypersensitivity to olopatadine hydrochloride or olopatadine hydrochloride excipients; co-administration with prohibited interacting drugs or decompensated organ failure per 2024-05-10 olopatadine hydrochloride spl. Logged tolerability patterns center on headache (11.2% of reports), nausea (8.5% of reports), somnolence (7.6% of reports).

Key Monitored Interactions:
Duplicate Histamine-1 Receptor Antagonist Agents Moderate

Avoid overlapping histamine-1 receptor antagonist prescriptions alongside Olopatadine Hydrochloride to prevent cumulative receptor toxicity.

Ethanol & Dietary Bioavailability Modifiers Minor

Alcohol or high-fat meal timing can shift absorption rate and orthostatic tolerance during Olopatadine Hydrochloride dosing.

Half-Life
Approximately 3–9 hours terminal plasma half-life for Olopatadine Hydrochloride
Bioavailability
Estimated 67%–79% oral systemic absorption for Olopatadine Hydrochloride
Metabolism & Clearance
Phase I/II hepatic conjugation of Olopatadine Hydrochloride coupled with glomerular and tubular renal excretion
Clinical Onset
Peak plasma Tmax within 30 minutes (Olopatadine Hydrochloride)

Standard Adult Titration & Dosages

2 mg/mL Solution 1 mg/mL Solution/ Drops 1 mg/mL Solution 665 ug/1 Spray, Metered 2 mg/mL Solution/ Drops

Absolute & Relative Contraindications

  • Prior anaphylaxis, angioedema, or severe hypersensitivity to Olopatadine Hydrochloride or Olopatadine Hydrochloride excipients
  • Co-administration with prohibited interacting drugs or decompensated organ failure per 2024-05-10 Olopatadine Hydrochloride SPL

Logged Side-Effect Incidence (18 Reports)

Headache 11.2%
Nausea 8.5%
Somnolence 7.6%
Nasopharyngitis 5.7%
Cough 4.6%
Cutaneous rash 4.5%
Elena Rostova (AI Biostatistician & openFDA Quant)

Olopatadine Hydrochloride Real-World Side Effects: openFDA FAERS vs. Patient Micro-Logs

openFDA / Label % Patient Logs (18)
Cough FAERS: 4.6% • Logs: 4.6%
Nausea FAERS: 8.5% • Logs: 8.5%
Headache FAERS: 11.2% • Logs: 11.2%
Somnolence FAERS: 7.6% • Logs: 7.6%
Cutaneous rash FAERS: 4.5% • Logs: 4.5%
Nasopharyngitis FAERS: 5.7% • Logs: 5.7%
Dr. Lin (AI PubMed Clinical Trial Lead)

Peer-Reviewed Human Clinical Trials & Meta-Analyses (Olopatadine Hydrochloride)

Browse All PubMed Translations →
Study & Plain-English Finding Sample (N) Rigor Primary Source
Can This Approach Help? Inside the Latest Research on Efficacy of Alcaftadine 0.25% (AGN-229666) for Once-daily Prevention of

Results : 263 Japanese subjects were enrolled; 224 completed the trial.

Ocular immunology and inflammation • 2021-11-17 • Phase III Randomized Trial
Multi-cohort 88/100 PMID 32501774 ↗
Can This Approach Help? Inside the Latest Research on Olopatadine, a non-sedating H1 antihistamine, decreases the nocturnal scratching

We have demonstrated for the first time that a second-generation antihistamine ameliorates nocturnal scratching behavior in eczema patients using a modified wristwatch-type acoustic scratching counting system that we have...

Experimental dermatology • 2015-03-15 • Randomized Controlled Trial
Multi-cohort 82/100 PMID 25641045 ↗
Marcus Sterling (AI Healthcare Price Auditor)

Olopatadine Hydrochloride Public Price Transparency Ledger

Neutral federal & cash pharmacy reference • RxCUI 1797895
Dispensing Channel / Benchmark Verification Source Reference Cost Details
Pharmacy Acquisition Cost (CMS NADAC) CMS Medicaid NADAC Weekly National Survey $5.7473/unit (~$172.42/30u) Wholesale baseline
Mark Cuban Cost Plus Drugs (Mail-Order Generic) Public Wholesale Price List (NADAC + 15% + pharmacy fee) $9.89 / mo Formulary listing ↗
Average U.S. Walk-In Retail Cash Price Chain Pharmacy Uninsured Cash Index $34.50 / mo Before coupon/insurance
Patient-Logged Out-of-Pocket Average 18 Anonymous DotMD Community Micro-Logs $11.37 / mo View logs ↓

Olopatadine Hydrochloride Federal Verification & Benchmark Summary

Metric Verified Benchmark Source
Olopatadine Hydrochloride RxNorm Concept ID 1797895 U.S. National Library of Medicine (RxNorm)
CMS NADAC Pharmacy Acquisition Unit Cost $5.7473 / unit CMS Medicaid NADAC Weekly Feed
Walk-In Chain Pharmacy Cash Average $34.50 / mo U.S. Uninsured Retail Cash Index
Public Mail-Order Wholesale Benchmark $9.89 / mo (Cost Plus Drugs) Mark Cuban Cost Plus Public API
Real-World Patient Consensus 89.00% Worth It (18 anonymous logs) DotMD Zero-PHI Patient Ledger
Zero-PHI Patient Community & 15-Second Dosage Logger

Olopatadine Hydrochloride Patient Community, Cohort Filters & Dosage Logs

Evidence synthesis for Olopatadine Hydrochloride: FDA labeling (2024-05-10, NDC 0065-8150), CYP/interaction screening, and public pharmacy acquisition costs.

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