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Pronunciation | /ɡwaɪˈfɛnɪsɪn/[1] |
Trade names | Mucinex, others |
Other names | Glyceryl guaiacolate |
AHFS/Drugs.com | Monograph |
MedlinePlus | a682494 |
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Routes of administration | By mouth |
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Pharmacokinetic data | |
Metabolism | Kidney |
Elimination half-life | 1–5 hours[3] |
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ECHA InfoCard | 100.002.021 |
Chemical and physical data | |
Formula | C10H14O4 |
Molar mass | 198.218 g·mol−1 |
3D model (JSmol) | |
Chirality | Racemic mixture |
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Guaifenesin, also known as glyceryl guaiacolate, is an expectorant medication taken by mouth and marketed as an aid to eliminate sputum from the respiratory tract. Chemically, it is an ether of guaiacol and glycerine. It may be used in combination with other medications.[4] A 2014 study found that guaifenesin has no effect on sputum production or clearance in upper respiratory infections.[5][6]
Side effects may include dizziness, sleepiness, skin rash, and nausea.[4] While it has not been properly studied in pregnancy, it appears to be safe.[7] It is believed to work by making airway secretions more liquid.[4]
Guaifenesin has been used medically since at least 1933.[8] It is available as a generic medication and over the counter.[4][7] In 2021, it was the 288th most commonly prescribed medication in the United States, with more than 600,000 prescriptions.[9][10]