TheraRadar
Data updated: May 26, 2026

KARBINAL ER (carbinoxamine maleate)

Respiratory Approved 2013-03-28

Karbinal ER is indicated for adults and pediatric patients two years of age and older for the symptomatic treatment of seasonal and perennial allergic rhinitis, vasomotor rhinitis, and allergic conjunctivitis caused by inhalant allergens and foods. It is also used to treat mild, uncomplicated allergic skin manifestations of urticaria, angioedema, and dermatographism. Additionally, it serves as adjunctive therapy to epinephrine for anaphylactic reactions after acute symptoms are controlled and is indicated for the amelioration of allergic reactions to blood or plasma.

How KARBINAL ER Works

Carbinoxamine maleate is an H1 receptor antagonist that competes with histamine for H1 receptor sites on effector cells. By blocking these receptors, it inhibits the physiological effects of histamine, providing antihistaminic activity. It also exhibits significant anticholinergic (drying) and sedative properties.

1
Indication
--
Phase 3 Trials
13
Years on Market

Details

Status
Prescription
First Approved
2013-03-28
Patent Cliff
2029

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Routes
ORAL
Dosage Forms
SUSPENSION, EXTENDED RELEASE

Companies

Active Ingredient: CARBINOXAMINE MALEATE

KARBINAL ER Approval History

2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Original
New Indication
New Form
Label Update
6 FDA actions from 2013 to 2026
Mar 2026 SUPPL
Label · Labeling
Mar 2021 SUPPL
Label · Labeling
May 2016 SUPPL
Mfg · Manufacturing (CMC)

What KARBINAL ER Treats

8 indications

KARBINAL ER is approved for 8 conditions since its original approval in 2013. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Allergic Rhinitis
  • Vasomotor Rhinitis
  • Allergic Conjunctivitis
  • Urticaria
  • Angioedema
  • Dermatographism
  • Anaphylactic Reaction
  • Allergic Reaction
Source: FDA Label

KARBINAL ER Competitive Set

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Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to KARBINAL ER

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FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

CARBINOXAMINE MALEATE
CARBINOXAMINE MALEATE
7 shared
SENORES PHARMS
Shared indications:
Allergic RhinitisVasomotor RhinitisAllergic Conjunctivitis +4 more
PROMETHAZINE HYDROCHLORIDE; CODEINE PHOSPHATE
PROMETHAZINE HYDROCHLORIDE
6 shared
CHARTWELL RX
Shared indications:
Allergic RhinitisVasomotor RhinitisAllergic Conjunctivitis +3 more
PROMETHAZINE HYDROCHLORIDE; DEXTROMETHORPHAN HYDROBROMIDE
PROMETHAZINE HYDROCHLORIDE
6 shared
COSETTE
Shared indications:
Allergic RhinitisVasomotor RhinitisAllergic Conjunctivitis +3 more
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Trial Timeline

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

KARBINAL ER FDA Label Details

Indications & Usage

FDA Label (PDF)

KARBINAL ER is indicated for the treatment of Allergic Rhinitis; Vasomotor Rhinitis; Allergic Conjunctivitis; Urticaria; Angioedema; Dermatographism; Anaphylactic Reaction; Allergic Reaction.

View full patent landscape →
2 OB patents · 1 families · 71 international docs across 15 countries

KARBINAL ER Patents & Exclusivity

Latest Patent: Mar 2029

Patents (2 active)

US8062667 Expires Mar 29, 2029
US9522191 Expires Jun 15, 2027
Source: FDA Orange Book

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Patent Timeline

  • Cliff: 2029
  • 2 active patents

Trial Analysis

  • Clinical trial tracking
  • Development stage analysis

Competitive Landscape

  • 20 similar drugs
  • Same target/indication analysis
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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.