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Mucinex (Guaifenesin)

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What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


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Mucinex is an over-the-counter (OTC) medication for relief from mucus buildup and is available without a prescription. Guaifenesin, an expectorant, works by thinning and loosening mucus in the airways, clearing congestion and making it easier to breathe normally through your nose. It is most commonly used by people experiencing the common cold or bronchitis, but in rarer instances, it may be recommended for persons with emphysema. Buy Mucinex from Canada and Canpharm to get the best price on it.

Fact Table
Formula C10H14O4
License US FDA
Bioavailability 70%
Legal status Rx-Only
Chemical Name Guaifenesin
Elimination half-life 1–5 hours
Dosage (Strength) 600mg (20 tablets), 1200mg (14 tablets)
Pregnancy Consult Doctor
Brands Mucinex
Protein binding Unknown
PubChem CID 3516
MedlinePlus a682494
ChEBI 5551
ATC code R05CA03
DrugBank DB00874
KEGG D00337
Routes of administration By mouth

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The standard Mucinex dosage is to take one tablet every 12 hours with a full glass of water as needed.

Swallow tablets whole and do not crush or chew them.


The active ingredient in Mucinex is Guaifenesin.


Be aware of risks between Mucinex tablets and breathing problems like asthma or any condition that would cause you to cough up large amounts of mucus or blood.

Do not take more than 2400 milligrams of this medication in a 24-hour period.

Be aware of the medication's expiry date.


No identified interaction risks exist between Mucinex and other OTC or prescription medications, but it is a good idea to inform your pharmacist of all medications you are currently taking before you buy Mucinex.

Side Effects

Side effects of Mucinex may occur; some users may experience nausea or vomiting as a result of using this medication. If side effects are experienced, consider stopping use and speaking with a pharmacist again regarding alternatives for mucus buildup relief.

Frequently Asked Questions about Mucinex (Guaifenesin)

What is Mucinex (Guaifenesin) used for?

Mucinex, containing Guaifenesin, is primarily used as an expectorant to help clear mucus from the respiratory tract associated with colds, infections, and allergies.

How does Mucinex (Guaifenesin) work?

Guaifenesin works by thinning and loosening mucus in the airways, clearing congestion, and making breathing easier.

How should Mucinex (Guaifenesin) be taken?

Mucinex should be taken orally, with or without food, as directed by a healthcare provider. It's important to follow the dosing instructions on the package or prescription.

What are the common side effects of Mucinex (Guaifenesin)?

Common side effects may include nausea, vomiting, headache, dizziness, and rash. However, many people taking Mucinex do not experience severe side effects.

Can Mucinex (Guaifenesin) be taken with other medications?

It is important to consult a healthcare provider before combining Mucinex with other medications, as it may interact with certain drugs.

Is Mucinex (Guaifenesin) safe for children?

The safety and dosage of Mucinex for children vary by age and formulation. Always consult a pediatrician before giving Mucinex to a child.

Can pregnant or breastfeeding women take Mucinex (Guaifenesin)?

The safety of Mucinex during pregnancy or breastfeeding is not fully established. It is crucial to consult a healthcare provider before use.

How long does it take for Mucinex (Guaifenesin) to work?

The effects of Mucinex can typically be felt within 30 minutes of ingestion, with full effects occurring in several hours.

Are there any people who should not take Mucinex (Guaifenesin)?

Individuals with certain medical conditions, such as severe kidney disease, should avoid Mucinex. Always discuss your health history with a healthcare provider before use.

What should I do if I miss a dose or overdose on Mucinex (Guaifenesin)?

If a dose is missed, take it as soon as remembered. However, if it's near the time for the next dose, skip the missed dose. In case of overdose, seek immediate medical attention.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.