Health Guide
Drug Guide

Guaifenesin/phenylephrine (By mouth)

Guaifenesin (gwye-FEN-e-sin), Phenylephrine (fen-il-EF-rin)

Treats cough and stuffy nose caused by hay fever or the common cold. Also thins mucus to make a cough more productive. This medicine is a combination of an expectorant and a decongestant.

Brand Name(s):

Ambi 10PEH/400GFN, Chest Congestion Relief PE, Children's Mucinex Cold, Children's Triaminic Chest & Nasal Congestion, Deconex IR, ED Bron GP, Entex LQ, Gilphex TR, J-Max, Liquibid D-R, Liquibid PD-R, Maxiphen, MucaphEd, Mucus Relief Sinus, MyDocs

There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not use this medicine if you have had an allergic reaction to guaifenesin or phenylephrine, or to other cold medicines, diet pills, or medicines to treat asthma, bronchitis, or attention deficit disorder. You should not use this medicine if you have used an MAO inhibitor (MAOI) such as Eldepryl®, Marplan®, Nardil®, or Parnate® within the past 14 days. You should not use this medicine if you have high blood pressure, heart or blood vessel disorders, or overactive thyroid. Do not give any over-the-counter (OTC) cough and cold medicine to a baby or child under 4 years old. Using these medicines in very young children might cause serious or possibly life-threatening side effects.

How to Use This Medicine:

Long Acting Tablet, Tablet, Syrup, Liquid, Solution, Capsule, 12 Hour Tablet

If a dose is missed:

How to Store and Dispose of This Medicine:

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Warnings While Using This Medicine:

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

If you notice these less serious side effects, talk with your doctor:

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088

Last Updated: 12/12/2016

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Thomson & A.D.A.M