Brompheniramine is an antihistamine that reduces the effects of the 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.
Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
The combination of brompheniramine, dextromethorphan, and phenylephrine is used to treat runny or stuffy nose, sneezing, itching, watery eyes, cough, and sinus congestion caused by allergies, the common cold, or the flu.
Alahist DM, BP Allergy DM, Bromatan-DM, Children's Cold & Cough DM, Cold & Cough Childrens, Dimaphen DM, Dimetapp Cold & Cough, Dimetapp DM Cold & Cough, DuraTan DM, Rynex DM, TL-Hist DM, Tussi-Pres B
Blurred vision; constipation; diarrhea; dizziness; drowsiness; dry mouth, nose, or throat; excitability; headache; increased sweating; loss of appetite; nausea; nervousness or anxiety; trouble sleeping; upset stomach; vomiting; weakness.
Seek medical attention right away if any of these SEVERE side effects occur while taking brompheniramine / dextromethorphan / phenylephrine:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest tightness; difficulty urinating or inability to urinate; fast or irregular heartbeat; fever, chills, or sore throat; flushing or redness of the face; hallucinations; mental or mood changes; numbness or tingling; seizures; severe dizziness, drowsiness, lightheadedness, or headache; severe dryness of mouth, nose, and throat; severe or persistent trouble sleeping; shortness of breath; tremor; unusual bruising or bleeding; vision changes.
(oral liquid, oral suspension, extended release)