Chlorpheniramine and methscopolamine are antihistamines that reduce the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.
Pseudoephedrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
Chlorpheniramine, methscopolamine, and pseudoephedrine is a combination medicine used to treat cough, runny or stuffy nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.
This medicine will not treat a cough that is caused by smoking, asthma, or emphysema.
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Stop using this medicine and call your doctor at once if you have:
fast or uneven heart rate;
pounding heartbeats or fluttering in your chest;
painful or difficult urination, little or no urinating;
tremors, seizure (convulsions); or
mood changes, severe dizziness or anxiety, double vision, hallucinations.
Common side effects may include:
headache, dizziness, drowsiness;
dry mouth, nose, or throat;
nausea, loss of appetite, diarrhea, constipation;
sleep problems (insomnia); 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. 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. If you need surgery or medical tests, tell the surgeon or doctor ahead of time if you have taken this medicine within the past few days. Do not take for longer than 7 days in a row. Talk with your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache or skin rash.