Informational only — Not medical advice. Always consult a licensed healthcare provider.

Community data Updated 23 hours ago

Indications

Guaifenesin is used for the temporary relief of coughs caused by the common cold, bronchitis and other breathing illnesses. It's usually not used for an ongoing cough from smoking or for long-term breathing problems (such as chronic bronchitis or emphysema), unless your doctor directs it. Guaifenesin is an expectorant. It thins and loosens the mucus in the airways, which clears congestion and makes breathing easier. If you are treating yourself with this medicine, read the package instructions carefully before you start, so you can be sure Guaifenesin is right for you. (See also the Precautions section.) Cough-and-cold products have not been shown to be safe or effective in children younger than 6 years. Sustained-release Guaifenesin is not recommended for children younger than 12 years unless the doctor specifically directs it. Ask your doctor or pharmacist for more details about using your product safely. These products do not cure the common cold or shorten it. To lower the risk of side effects, follow all the dosage directions carefully. Don't give other cough-and-cold medicine that might contain the same or similar ingredients (see also the Drug Interactions section). You can also ask the doctor or pharmacist about other ways to relieve cough and cold symptoms, such as drinking enough fluids, using a humidifier or using saline nose drops or spray.

⚠️ Always consult a registered physician before taking any medicine.

Dosage Reference

⚠️ Reference ranges from official sources only. Consult your doctor for personalized dosing.

Adults: Take guaifenesin by mouth, with or without food, as your doctor directs. It is usually taken every 12 hours with a full glass of water. If you are treating yourself, follow the directions on the product package, and ask your doctor if you have any questions. The dosage depends on your age, your medical condition and how you respond to treatment. Don't take more than 2400 milligrams in 24 hours. Don't increase your dose, and don't take the medicine more often than directed. Swallow the tablets whole. Don't crush or chew them, because that can release all of the drug at once and raise the risk of side effects. Drink plenty of fluids while you are taking this medicine. Fluids help to break up mucus and clear congestion.