Medically Reviewed on 11/7/2022

Brand Name: Diabetic Tussin, Geri-Tussin, Robitussin, Fenesin IR, Mucinex, Mucosa, Mucus Relief, Mucus ER

Generic Name: guaifenesin

Drug Class: Cough/Cold, Other Combos, Antitussive Decongestant Expectorant Combos

What is guaifenesin and what are its uses?

Guaifenesin treats coughs associated with colds and minor upper respiratory tract infections in individuals 12 years and older.

What brand names are available for guaifenesin?

Diabetic Tussin, Geri-Tussin, Robitussin, Fenesin IR, Mucinex, Mucosa, Mucus Relief, Mucus ER

Is guaifenesin available as a generic drug?


Do I need a prescription for guaifenesin?


What are the side effects of guaifenesin?

Side effects of guaifenesin are uncommon, but can include:

What is the dosage for guaifenesin?

Guaifenesin may be taken with or without food. The tablets should be taken whole and should not be crushed, chewed, or broken. The recommended dose is 600-1200 every 12h hours up to a maximum of 2.4 g per day. Patients should consult a healthcare professional if symptoms last more than 7 days.

Which drugs or supplements interact with guaifenesin?

There are no known drug interactions with guaifenesin.


The common cold is one of the most common illnesses in the world. See Answer

Is guaifenesin safe to take if I'm pregnant or breastfeeding?

Although one analysis found a correlation between guaifenesin use in the first trimester of pregnancy and an increased risk of hernia in the fetus, others found no increased risk of fetal malformations. Thus, guaifenesin should be used in pregnancy only if the physician feels that the potential benefits outweigh the potential and unknown risks.

It is not known if guaifenesin is secreted into breast milk.

What else should I know about guaifenesin?

What preparations of guaifenesin are available?

Tablet (extended-release): 600, and 1200 mg

How should I keep guaifenesin stored?

Tablets, capsules, and syrup should be stored below 30 C (86 F). The liquid should not be refrigerated.


Guaifenesin (Humibid, Humibid LA, Robitussin, Organidin NR, Fenesin, Mucosa, Mucus Relief, Mucus ER, Mucinex) is a expectorant medication used for the treatment of cough due to colds or minor upper respiratory tract infections. Side effects and pregnancy efficacy should be reviewed prior to taking this medication.

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See more info: guaifenesin on RxList
Medically Reviewed on 11/7/2022
Medically reviewed by John P. Cunha, DO, FACOEP; Board Certified Emergency Medicine


FDA Prescribing Information