Description
- Adults and children 12 years or older: 200 to 400 mg every 4 hours (liquid and oral tablets), 600 to 1200 mg every 12 hours (extended-release tablets). Do not take more than 2400 mg in 24 hours.
- Children 6 to 11 years: 100 to 200 mg every 4 hours. Do not take more than 1200 mg in 24 hours.
- Children 2 to 5 years: 50 to 100 mg every 4 hours. Do not take more than 600 mg in 24 hours.
- Children less than 2 years: Do not use without talking to your health care provider.
How does guaifenesin work (mechanism of action)?
Guaifenesin is an expectorant. It helps decrease chest congestion by thinning and loosening mucus, making coughs more productive. This helps clear the mucus from your airways, making it easier to breathe.
How is guaifenesin supplied (dosage forms)?
Guaifenesin is available in Mucinex, Robitussin, Tussin, Diabetic Tussin, and other brand and generic products for children and adults. Some common formulations of guaifenesin products are listed below.
- 200 mg, 400 mg oral tablets
- 600 mg, 1200 mg extended-release oral tablets
- 100 mg/5 mL, 200 mg/5 mL oral liquid
There are many OTC and prescription cough and cold products that contain guaifenesin alone or in combination with other ingredients. Always check the labels of all medicines you take. Ask your pharmacist if you are unsure if your other medicines also contain guaifenesin.
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