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A member asked:
Will taking 800 mg of guaifenesin cause side effects?
A doctor has provided 1 answer
Depends on age: No. The usual dose is 600 mg of guaifenisn and sometimes up to 1200 as a sustained release formula for an adult.. Anyone can be sensitive to any medication so it may cause side effects in a sensitive individual. Rashes, hives, trouble breathing are all signs of an allergic reaction. www.drugs.com has great information on any drug.
Answered 11/16/2018
5.9k views
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