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Medications and Drugs

Brand Names: Broncotron-D, Dacex-DM, Dacex-PE, Deconex DM, Deconex DMX, Despec DM Syrup, DuraMAX, Duraphen DM, Duraphen Forte, Endacon, Guaphen Forte, Maxiphen-G DM, Mucinex Children's Multi-Symptom Cold, Mucinex Fast-Max Severe Congestion & Cough, Phlemex Forte, Pres Gen Pediatric, Q-Tussin CF, Robafen CF, Robitussin Children's Cough & Cold CF, Robitussin Cough & Cold CF, Robitussin Cough & Cold CF Max, Robitussin Cough & Cold CF To Go, Robitussin Maximum Strength Multi-Symptom Cold, Robitussin Multi-Symptom Cold, Robitussin Pediatric Cough & Cold CF, Supress-DX, Tusicof, Tussin CF, Tussi-Pres, Tussi-Pres Pediatric, Zotex-EX, Z-tuss DM

Generic Name: dextromethorphan, guaifenesin, and phenylephrine (Pronunciation: dex troe meth OR fan, gwye FEN e sin, fen il EFF rin)

What is dextromethorphan, guaifenesin, and phenylephrine (Broncotron-D, Dacex-DM, Dacex-PE, Deconex DM, Deconex DMX, Despec DM Syrup, DuraMAX, Duraphen DM, Duraphen Forte, Endacon, Guaphen Forte, Maxiphen-G DM, Mucinex Children's Multi-Symptom Cold, Mucinex Fast-Max Severe Congestion & Cough, Phlemex Forte, Pres Gen Pediatric, Q-Tussin CF, Robafen CF, Robitussin Children's Cough & Cold CF, Robitussin Cough & Cold CF, Robitussin Cough & Cold CF Max, Robitussin Cough & Cold CF To Go, Robitussin Maximum Strength Multi-Symptom Cold, Robitussin Multi-Symptom Cold, Robitussin Pediatric Cough & Cold CF, Supress-DX, Tusicof, Tussin CF, Tussi-Pres, Tussi-Pres Pediatric, Zotex-EX, Z-tuss DM)?

Dextromethorphan is a cough suppressant. It affects the signals in the brain that trigger cough reflex.

Guaifenesin is an expectorant. It helps loosen congestion in your chest and throat, making it easier to cough out through your mouth.

Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).

The combination of dextromethorphan, guaifenesin, and phenylephrine is used to treat cough, stuffy nose, sinus congestion and chest congestion caused by allergies, the common cold, or the flu.

This medicine will not treat a cough that is caused by smoking, asthma, or emphysema.

Dextromethorphan, guaifenesin, and phenylephrine may also be used for purposes not listed in this medication guide.

What are the possible side effects of dextromethorphan, guaifenesin, and phenylephrine?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using this medication and call your doctor at once if you have a serious side effect such as:

Less serious side effects may include:

  • diarrhea;
  • dizziness, drowsiness;
  • sleep problems (insomnia); or
  • feeling nervous, restless, or irritable.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about dextromethorphan, guaifenesin, and phenylephrine?

Do not use this medicine if you have untreated or uncontrolled diseases such as high blood pressure or coronary artery disease.

Do not use this medicine if you have used an MAO inhibitor such as furazolidone (Furoxone), isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam, Zelapar), or tranylcypromine (Parnate) in the last 14 days. A dangerous drug interaction could occur, leading to serious side effects.



Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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Use the pill finder tool on RxList.



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