Guaifenesin (By mouth)
Health Guide
Drug Guide

Guaifenesin (By mouth)

Guaifenesin (gwye-FEN-e-sin)

Thins mucus so you can clear it from your head, throat, and lungs.

Brand Name(s):

Allfen, Chest Congestion Relief, Children's Mucinex, Cough, Diabetic Siltussin DAS-Na, Diabetic Tussin, Good Neighbor Pharmacy Children's Mucus Relief, Good Neighbor Pharmacy Mucus ER, Good Neighbor Pharmacy Mucus Relief, Good Neighbor Pharmacy Tussin, Good Neighbor Pharmacy Tussin Chest Congestion, Good Sense Children's Mucus Relief, Good Sense Mucus Relief, Good Sense Tussin, GoodSense Tussin Mucus + Chest Congestion

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 ever had an allergic reaction to guaifenesin. 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:

Capsule, Tablet, Long Acting Capsule, Long Acting Tablet, Liquid

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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