Dexchlorpheniramine 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.
Dextromethorphan is a cough suppressant. It affects the signals in the brain that trigger cough reflex.
Pseudoephedrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
Dexchlorpheniramine, dextromethorphan, and pseudoephedrine is a combination medicine used to treat runny or stuffy nose, sneezing, itching, watery eyes, cough, and sinus congestion caused by allergies, the common cold, or the flu.
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Abatuss DMX, Bromatan Plus, SuTan-DM
Stop using this medicine and call your doctor at once if you have:
fast, slow, or uneven heart rate;
severe headache, mood changes, hallucinations;
severe dizziness or anxiety, feeling like you might pass out;
tremor, seizure (convulsions);
easy bruising or bleeding, unusual weakness;
little or no urinating;
shortness of breath; or
dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, confusion, chest pain, uneven heartbeats, seizure).
Common side effects may include:
mild dizziness, drowsiness;
dry mouth, nose, or throat;
nausea, diarrhea, constipation, upset stomach;
feeling nervous, restless, or irritable;
blurred vision; or
sleep problems (insomnia).
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. Cough or 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, or break an extended-release tablet. Swallow it whole. Measure liquid medicine with a special dose-measuring spoon or medicine cup. 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. If you need surgery or medical tests, tell the surgeon or doctor ahead of time if you have taken a cough or cold medicine within the past few days.