What is guaifenesin?

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

Guaifenesin is used to reduce chest congestion caused by the common cold, infections, or allergies.

Guaifenesin may also be used for other purposes not listed in this medication guide.

Precautions

You should not use this medicine if you are allergic to guaifenesin.

FDA pregnancy category C. This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

It is not known whether guaifenesin passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

This medication can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

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Instructions

Seek emergency medical attention if you think you have used too much of this medicine.

An overdose of guaifenesin is not likely to cause life-threatening symptoms.

Take the missed dose as soon as you remember. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not take extra medicine to make up the missed dose.

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Side Effects

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

Less serious side effects may include:

  • dizziness or headache,
  • a rash, or
  • nausea, vomiting, or stomach upset.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.

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Interactions

There may be other drugs that can interact with guaifenesin. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.

Other Names

Actifed CC Chesty Cough, Altarussin, Altorant, Anti-Tuss, Aquamist, Balminil Expect Edulcore Au Sucrose, Beechams Veno's Expectorant, Beechams Veno's for Kids Chesty Cough, Benadryl Chesty Forte, Benylin Chesty Coughs, Benylin Children's Chesty Coughs, Benylin E, Benylin E Extra Strength, Benylin E Extra Strength with Menthactin, Bidex, Breonesin, Calmylin Expectorant, Diabetic Expectorant, Diabetic Tuss, Dristan Chesty Cough, Dristan Chesty Cough Guaiphenesin, Drituss G, Family Meltus Chesty Coughs, Fenesin, Fenex-LA, G Bid, GG 200 NR, GG-Cen, Ganidin NR, Genatuss, Glytuss, Gua-SR, Guaiatussin, Guaibid-LA, Guaifenex G, Guaifenex LA, Guiacough, Guiadrine G-1200, Guiatuss, Halotussin, Hill's Balsam Chesty Cough, Humavent LA, Humibid, Humibid Pediatric, Humibid e, Humigen LA, Hytuss, Iodrol NR, Iofen, Iofen-NF, Iophen NR, Jackson's Extra Strength All Fours, Jackson's The Original All Fours, Junior Meltus Chesty Coughs with Catarrh, Junior Meltus Colour and Sugar Free Expectorant, Kenkay Chesty Cough Eexpectorant, Lemsip Cough Chesty, Liqufruta Garlic Cough Medicine, Liquibid, Liquidbid 1200, Liquidbid LA, Lloydspharmacy Expectorant Adult Cough, Lloydspharmacy Expectorant Junior Cough, Lotussin, Mastussin, Mucinex, Mucinex Childrens, Mucinex Childrens Mini-Melts, Mucinex Junior Strength Mini-Melts, Muco-Fen, Muco-Fen 1200, Muco-Fen 800, Muco-Fen LA, Mucobid-L.A., MucusRelief, Mytussin, Naldecon-EX Senior, Nirolex Chesty Cough, Nyal Chesty Cough, Organidin NR, Phanasin, Pharmacist Expectorant, Pneumomist, Q-Bid LA, Q-Tussin, Respa-GF, Ri-Tussin, Robafen, Robichem, Robitussin, Robitussin Chesty Cough, Robitussin EX Colour Free, Robitussin EX Paediatric Drops, Robitussin-EX, Scot Tussin Expectorant, Scot-Tussin, Siltuss DAS, Sinumist, Sorbutuss, Strepsils Chesty Cough, T-Tussin, Tixylix Chesty Cough, Touro EX, Triaminic Chest Congestion, Tusscidin, Tussin, Tussin Expectorant, Vicks Cough Syrup for Chesty Coughs, Vicks Formula 44 for Chesty Coughs, Xpect, guaifenesin, Allfen, Amibid LA, Bidex-400, Buckley's Chest Congestion, Duratuss G, Fenesin IR, Guaifenesin LA, Guaifen NR, Mucinex Kids' Mini-Melts, Mucinex Max Strength, Organ-1 NR, Robitussin Chest Congestion, Siltussin, and Siltussin DAS-NA

Available Strengths & Dosages


Route Form Strength
oral tablet, extended release 600 mg

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Disclaimer

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2004 Cerner Multum, Inc. Version 2.05. Revision date 8/23/04

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