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Applies to guaifenesin: oral liquid, oral packet, oral solution, oral syrup, oral tablet, oral tablet extended release
Along with its needed effects, guaifenesin may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
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
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
GeneralGuaifenesin has been generally well tolerated.
GastrointestinalGastrointestinal side effects have included stomach upset and vomiting with higher than recommended doses. Doses recommended for expectoration have rarely been associated with gastrointestinal upset.
Nervous systemNervous system side effects have occasionally included dizziness and headache.
DermatologicDermatologic side effects have included rare reports of rash.
HypersensitivityHypersensitivity side effects have included a report of an anaphylactic reaction.
Medically reviewed by USARx EDITORIAL TEAM Last updated on 1/3/2022.
Source: Drugs.com Guaifenesin (www.drugs.com/guaifenesin.html).
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