Mucinex (Guaifenesin - non Rx)

Prescription Prescription Not Required     Customer Reviews
Mucinex Brand
Dosage Quantity & Price
Guaifenesin - non Rx (Generic alternate to Mucinex) Generic

We don't sell this generic-version medication.

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Table of contents:

Mucinex is a medication used to provide temporary relief from coughs caused by the common cold, bronchitis, and other respiratory illnesses. Guaifenesin, an active ingredient in Mucinex, is an expectorant which works by thinning and loosening mucus in the airways, thereby clearing congestion and making breathing easier.

Mucinex is an expectorant. It is used to reduce chest congestion caused by common colds, infections, or allergies. It should not be used for ongoing cough caused by smoking or chronic respiratory conditions such as bronchitis and emphysema, unless instructed by a physician.

Mucinex is a unique medication, containing bi-layer tablets with one layer designed for immediate release, and the other layer designed for extended release. This allows the drug to be released gradually, providing relief over a longer period.

Uses and Dosage

Mucinex (Guaifenesin), a non-prescription medication, should be taken orally with or without food, as directed by your physician, typically every 12 hours with a full glass of water. Dosage for Guaifenesin should be based on age, medical condition, and response to treatment, and should not exceed 2400 milligrams in 24 hours.

If you are self-treating with guaifenesin, it is important to read the package instructions carefully before you start using this product to be sure it is right for you. Patients should not increase their dose or take the drug more often than directed. The tablets should be swallowed whole without crushing or chewing, as this action could lead to the sudden release of the drug and increase the risk of side effects. Adequate hydration should be maintained while taking this medication as fluids can help to break up mucus and clear congestion.

Side effect

Common side effects of Mucinex may include:

  • Dizziness
  • Headache
  • Rash
  • Nausea
  • Vomiting
  • Stomach upset

Form and strength

Mucinex is available in the following forms and strength:

Mucinex: Extended Release 12Hour Tablet

  • 600 mg


Some cautions to keep in mind when taking Mucinex (Guaifenesin) include:

  • It should not be taken in higher doses or more frequently than prescribed.
  • It should not be used for more than three days in a row without talking to a doctor.
  • It should not be taken with other medications that contain guaifenesin.
  • Do not take Mucinex if you have kidney disease, unless directed by a doctor.
  • Do not take Mucinex if you are pregnant or breastfeeding, unless directed by a doctor.
  • Do not take Mucinex if you are allergic to any of its ingredients.
  • Do not give Mucinex to children under the age of 4 without talking to a doctor first.

 Frequently Asked Questions (FAQ)

Frequently Asked Questions and their answers about Mucinex (Guaifenesin)

What is Mucinex (Guaifenesin)?

Mucinex (Guaifenesin) is an over-the-counter medication used to relieve chest congestion by loosening phlegm and thinning the mucus in the lungs.

How should I take Mucinex (Guaifenesin)?

It should be taken orally with or without food, usually every 12 hours with a full glass of water, as directed by your doctor. The dosage for Guaifenesin varies based on age, medical condition, and response to treatment, and should not exceed 2400 milligrams in 24 hours.

How often can I take Mucinex (Guaifenesin)?

The recommended dosage for adults and children 12 years of age and older is 1 tablet every 12 hours. Do not take more than 2 tablets in a 24-hour period.

Does Mucinex (Guaifenesin) interact with other medications?

Yes, Mucinex (Guaifenesin) can interact with certain medications, such as diuretics, antidepressants, and antifungals. Be sure to tell your doctor or pharmacist about all the medications you are taking before taking Mucinex (Guaifenesin).


It's important to purchase Mucinex from verified Canadian pharmacy.

Additional information

Generic name:

Guaifenesin – non Rx


Extended Release 12Hour Tablet



Quantities Available:

20, 100