Treating allergy symptoms such as runny nose, watery/itchy eyes, rash, or hives. It may also be used for other conditions as determined by your doctor.

Karbinal ER extended-release suspension is an antihistamine. It works by blocking the action of histamine, which reduces the symptoms of an allergic reaction.

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  • Karbinal ER
  • Decreased coordination; diarrhea; dizziness; drowsiness; dry mouth, nose, or throat; nausea; thickening of mucus in the nose or throat.

    Seek medical attention right away if any of these SEVERE side effects occur:
    Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); change in the amount of urine produced; confusion; fainting; fast or irregular heartbeat; seizures; severe or persistent dizziness or drowsiness; tremor; vision changes; wheezing.
  • 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. [see Warnings and Precautions (5.5)] 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