Brompheniramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.

Brompheniramine is used to treat runny nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.

Brompheniramine may also be used for purposes not listed in this medication guide.

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  • Bromax, Dimetane Extentab, J-Tan PD, Siltane, VaZol
  • Stop using brompheniramine and call your doctor at once if you have a serious side effect such as:

    fast or uneven heart rate;
    mood changes;
    tremor, seizure (convulsions);
    easy bruising or bleeding, unusual weakness;
    feeling short of breath; or
    urinating less than usual or not at all.
    Less serious side effects may include:

    dizziness, drowsiness;
    dry mouth, nose, or throat;
    constipation;
    blurred vision; or
    feeling nervous or restless.
  • Usual Adult Dose for Allergic Rhinitis Immediate Release: 4 mg to 8 mg orally every 6 hours as needed. The duration of action varies from patient to patient. Many patients will require dosing only twice daily. Extended Release: 6 mg to 12 mg extended release orally twice daily as needed. The duration of action varies from patient to patient. Many patients will require dosing only once a day, preferably at bedtime to avoid drowsiness. Maximum oral dose 24 mg/day.