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mucinex d

Mucinex D is a combination medicine containing Guaifenesin and Pseudoephedrine Hydrochloride.

Guaifenesin and Pseudoephedrine Hydrochloride · by Rb Hlth

Available as a generic: Guaifenesin and Pseudoephedrine Hydrochloride

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass
$0.07 /mL
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This medication~$0.07
Cheapest in class · advil pm~$0.04
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Key facts

Active ingredient
Guaifenesin and Pseudoephedrine Hydrochloride
Form
Tablet, extended release
Strength
Guaifenesin 1.2GM; Pseudoephedrine Hydrochloride 120MG · Guaifenesin 600MG; Pseudoephedrine Hydrochloride 60MG
Type
Over-the-counter (OTC)
Brand or generic
Brand-name
Manufacturer
Rb Hlth
Half-life
roughly 3 to 16 hours — the label does not give one number, because the elimination half-life depends on urine pH: about 3 to 6 hours when urine pH is 5 (acidic), and about 9 to 16 hours when urine pH is 8 (alkaline) (how long it stays in your system)
What the pharmacy pays
~$0.07 per ml — not your price
FDA application
NDA021585

What is Mucinex D?

From the FDA label:Uses • helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive • temporarily relieves nasal congestion due to: • common cold • hay fever • upper respiratory allergies • temporarily restores freer breathing through the nose • promotes nasal and/or sinus drainage • temporarily relieves sinus congestion and pressure

How to use

Directions • do not crush, chew, or break tablet • take with a full glass of water • this product can be administered without regard for timing of meals • adults and children 12 years and older: 2 tablets every 12 hours; not more than 4 tablets in 24 hours • children under 12 years of age: do not use

Warnings

Important safety information

Do not use if you are now taking a prescription monoamine oxidase inhibitor (MAOI) (certain drugs for depression, psychiatric, or emotional conditions, or Parkinson's disease), or for 2 weeks after stopping the MAOI drug. If you do not know if your prescription drug contains an MAOI, ask a doctor or pharmacist before taking this product. Ask a doctor before use if you have • heart disease • high blood pressure • thyroid disease • diabetes • trouble urinating due to an enlarged prostate gland • persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema • cough accompanied by too much phlegm (mucus) When using this product • do not use more than directed Stop use and ask a doctor if • you get nervous, dizzy, or sleepless • symptoms do not get better within 7 days, come back or occur with a fever, rash, or persistent headache. These could be signs of a serious illness. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away (1-800-222-1222).

How long does Guaifenesin and Pseudoephedrine Hydrochloride stay in your body?

The elimination half-life of guaifenesin and pseudoephedrine hydrochloride is roughly 3 to 16 hours — the label does not give one number, because the elimination half-life depends on urine pH: about 3 to 6 hours when urine pH is 5 (acidic), and about 9 to 16 hours when urine pH is 8 (alkaline) — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. This is a genuinely variable half-life, not a fixed one. Pseudoephedrine is cleared mostly unchanged by the kidneys (55% to 96% of a dose appears unchanged in urine), and because it is a base, acidic urine traps and flushes it out faster while alkaline urine lets it be reabsorbed — hence the 3-6 h vs 9-16 h spread the label reports. No active metabolite to worry about: the label says less than 1% is metabolized in the liver, by N-demethylation, to an INACTIVE metabolite. It is not a prodrug. Kidney impairment: because clearance is renal, the label states pseudoephedrine "may accumulate in patients with renal impairment," and the product is to be generally avoided in these patients — expect a longer half-life, though the label does not quantify it. Liver impairment: no studies of pseudoephedrine were conducted in hepatic impairment, so the label gives no number; the product is likewise to be generally avoided. Older adults: this label gives no separate pseudoephedrine half-life for people 65+ (its geriatric pharmacokinetic data covers the antihistamine component only), but it warns that older adults are more likely to have adverse reactions to sympathomimetic amines. The half-life above is from the Clarinex-D 12 Hour label, which is where FDA-approved pseudoephedrine pharmacokinetics are published; standalone OTC pseudoephedrine products carry monograph "Drug Facts" labels that contain no pharmacokinetics section at all.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: CLARINEX-D 12 HOUR (desloratadine and pseudoephedrine sulfate) extended release tablets — Section 12.3 Pharmacokinetics, DailyMed.

Dosage forms

Tablet, extended release

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

Ways to save

Ask for the generic

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Request a 90-day supply

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Use copay cards

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Frequently asked questions

How much does Mucinex D cost?
Nobody can tell you what you will pay — your price is set by your insurer's formulary, your deductible and the pharmacy's markup, and none of those are published. What IS published is what the pharmacy paid to acquire it: about $0.07 per ml, per the CMS NADAC survey. Treat that as the floor, not the quote — ask the pharmacist for the cash price as well as your copay, because for cheap generics the cash price often wins. Pharmacies pay less for a same-class option, Advil Pm — about $0.04 on the same basis.
Is there a coupon or discount for Mucinex D?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Mucinex D. To pay less, look for a store-brand version with the same active ingredient (Guaifenesin and Pseudoephedrine Hydrochloride), which is typically cheaper, and compare unit prices. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Mucinex D?
Mucinex D is marketed by Rb Hlth. You can see Rb Hlth's full profile, rating, and other products on pharmaranks.
Is Mucinex D a brand-name or generic drug?
Mucinex D is a brand-name product with the active ingredient Guaifenesin and Pseudoephedrine Hydrochloride. Lower-cost generic equivalents containing Guaifenesin and Pseudoephedrine Hydrochloride are available — ask your pharmacist.
Is Mucinex D available over the counter?
Yes. Mucinex D is an over-the-counter (OTC) product — you can buy it without a prescription. Follow the label directions and ask a pharmacist if you're unsure whether it's right for you.
What forms does Mucinex D come in?
Mucinex D is currently marketed as tablet, extended release, per the FDA's National Drug Code Directory.
Is Mucinex D FDA-registered?
Mucinex D is on record with the U.S. FDA under application number NDA021585. You can verify this on its official FDA label.
Is Mucinex D safe?
There's no single safe-or-not verdict, and we don't yet have a composite recall-safety score for Mucinex D. Review its FDA-label side effects and warnings below, and always consult a licensed professional.

Clinical content sourced from the FDA label via openFDA (U.S. FDA). View the FDA label on DailyMed → Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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