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.
Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
Brompheniramine and phenylephrine is a combination medicine used to treat symptoms of the common cold or seasonal allergies, including sneezing, runny or stuffy nose, and itchy, watery eyes.
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Children's Cold & Allergy, Dimaphen Elixir, Dimetapp Cold & Allergy, LoHist PEB, Rynex PE, VazoBid, Vazotab
Stop using brompheniramine and phenylephrine and call your doctor at once if you have:
chest pain, rapid pulse, fast or uneven heart rate;
confusion, hallucinations, severe nervousness;
tremor, seizure (convulsions);
little or no urinating;
easy bruising or bleeding, unusual weakness; or
dangerously high blood pressure (severe headache, buzzing in your ears, anxiety, shortness of breath).
Common side effects may include:
dizziness, drowsiness, blurred vision;
dry nose or mouth;
nausea, stomach pain, constipation, loss of appetite;
problems with memory or concentration; or
feeling restless or excited (especially in children).
Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. Cold medicine is usually taken only for a short time until your symptoms clear up. Do not give this medication to a child younger than 4 years old. Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children. Do not crush, chew, break, or open an extended-release tablet or capsule. Swallow it whole. Breaking or opening the pill may cause too much of the drug to be released at one time. The chewable tablet must be chewed before swallowing. Measure liquid medicine with a special dose-measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one. Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache, cough, or skin rash. This medication can cause unusual results with allergy skin tests. Tell any doctor who treats you that you are taking an antihistamine.