What side effects can this medication cause?
Stop taking brompheniramine and seek emergency medical attention if you experience a rare but serious allergic reaction (for example, difficulty breathing, closing of the throat, swelling of the lips, tongue, or face, or hives).
Other less serious side effects may be more likely to occur. Continue to take brompheniramine and talk to your doctor if you experience:
sleepiness, fatigue, or dizziness
difficulty urinating or an enlarged prostate
headache
dry mouth
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
Why is this medication prescribed?
Dosage and using this medicine
What special precautions should I follow?
What should I do if I forget a dose?