Guaifen NR Side Effects

Generic name: guaifenesin

Medically reviewed by Drugs.com. Last updated on Sep 6, 2023.

Note: This document provides detailed information about Guaifen NR Side Effects associated with guaifenesin. Some dosage forms listed on this page may not apply specifically to the brand name Guaifen NR.

Applies to guaifenesin: oral liquid, oral solution, oral syrup, oral tablet, oral tablet extended release.

Common side effects of Guaifen NR

Some side effects of guaifenesin may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common or rare

• diarrhea
• dizziness
• headache
• hives
• nausea or vomiting
• skin rash
• stomach pain

Serious side effects of Guaifen NR

Along with its needed effects, guaifenesin (the active ingredient contained in Guaifen NR) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

For healthcare professionals

Applies to guaifenesin: compounding powder, oral capsule, oral capsule extended release, oral granule, oral liquid, oral solution, oral tablet, oral tablet extended release.

General

Guaifenesin (the active ingredient contained in Guaifen NR) has been generally well tolerated.^[Ref]

Gastrointestinal

Gastrointestinal side effects have included stomach upset and vomiting with higher than recommended doses. Doses recommended for expectoration have rarely been associated with gastrointestinal upset.^[Ref]

Nervous system

Nervous system side effects have occasionally included dizziness and headache.^[Ref]

Dermatologic

Dermatologic side effects have included rare reports of rash.^[Ref]

Hypersensitivity

Hypersensitivity side effects have included a report of an anaphylactic reaction.^[Ref]

Frequently asked questions

• Does Mucinex help you get pregnant?
• Does Mucinex help with Covid?
• What is the dose for an adult for Robitussin DM? How many times a day?

Further information

Guaifen NR side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

Medical Disclaimer