Karbinal™ ER (carbinoxamine maleate) Extended-release Oral Suspension provides
symptomatic relief of seasonal and perennial allergic rhinitis in children at least 2 years of age.
Unique Features
of Karbinal ER
Read more about the dosing and administration of Karbinal ER.

With Karbinal ER, you get the convenience of twice-daily dosing

Karbinal ER is the only 12-hour oral suspension carbinoxamine. A convenient option for children as young as 2 years of age.

But that’s not all, Karbinal ER comes in a child-friendly, strawberry-banana tasting liquid formulation.
12-hour dosing
Child-friendly liquid formulation
Strawberry-banana Flavored
Broad indications and symptom relief
Dosage and Administration of Karbinal ER

The dosage of Karbinal ER should be individualized based on the severity of the condition and the response of the patient. Start with lower doses and increase as needed and tolerated.

Administer Karbinal ER by the oral route only. Measure Karbinal ER with an accurate milliliter measuring device. A household teaspoon is not an accurate measuring device and could lead to overdosage. A pharmacist can provide an appropriate measuring device and can provide instructions for measuring the correct dose.

Adults and Adolescents 12 years of age and older:

  • 7.5 mL to 20 mL (6 to 16 mg) every 12 hours

Children 2 to 11 years of age (approximately 0.2 to 0.4 mg/kg/day):

  • 2 to 3 years: 3.75 mL to 5 mL (3 to 4 mg) every 12 hours
  • 4 to 5 years: 3.75 mL to 10 mL (3 to 8 mg) every 12 hours
  • 6 to 11 years: 7.5 mL to 15 mL (6 to 12 mg) every 12 hours

Using weight-based formula of 0.2 to 0.4 mg/kg/day1

1. Karbinal ER Prescribing Information. Englewood, CO Aytu BioPharma, Inc. 2021.
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What is the most important information I should know about Karbinal ER?

  • Karbinal ER is contraindicated in children younger than 2 years of age, and nursing mothers.
  • Karbinal ER may produce marked drowsiness and impair the mental or physical abilities required for the performance of potentially hazardous tasks such as driving a car or operating machinery.
  • Advise patients to avoid engaging in hazardous tasks requiring mental alertness and motor coordination after ingestion of Karbinal ER. Avoid concurrent use of Karbinal ER with alcohol or other central nervous system depressants because additional impairment of central nervous system performance may occur.
  • Avoid use of Karbinal ER with alcohol and other CNS depressants (hypnotics sedatives, tranquilizers, etc.) due to additive effects.
  • Karbinal ER is contraindicated in patients who are taking monoamine oxidase inhibitors (MAOI).

What are the possible side effects of Karbinal ER?

Use of Karbinal ER may result in decreased mental alertness with impaired mental or physical abilities.

The most frequent side effects include:

  • Sedation
  • Sleepiness
  • Dizziness
  • Disturbed coordination
  • Epigastric distress
  • Thickening of bronchial secretions

Ask your doctor or pharmacist for more information.

Call your doctor for medical advice about side effects.

You may report side effects to FDA at 1-800-FDA-1088.

For additional safety information, click here for Full Prescribing Information and discuss with your healthcare provider.

Keep Karbinal ER and all medicines out of the reach of children.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.