Pseudoephedrine: uses, dosing, side effects & brands
Pseudoephedrine is an alpha-adrenergic agonist sold in the U.S. under 5 brand and generic names, for asthma, common cold and perennial allergic rhinitis. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Drug class
- Alpha-Adrenergic Agonist
- Treats (across its forms)
- Asthma, Common Cold and Perennial Allergic Rhinitis
- Available as
- Capsule, extended release · Tablet, extended release · Tablet
- Sold as
- 5 products — Novafed, Sudafed 12 Hour and Sudafed 24 Hour, and others
- Prescription?
- Both Rx and OTC forms
- Generic available?
- Yes
- 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)
- What the pharmacy pays
- about $8 for a 30-count supply — not your price
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How Pseudoephedrine Hydrochloride is dosed
From the FDA label for Pseudoephedrine Hydrochloride (application ANDA077442). Other pseudoephedrine products — different forms, different strengths — are dosed differently. Follow the label for the one you were prescribed.
Directions adults and children 12 years and over take 1 tablet every 12 hours do not take more than 2 tablets in 24 hours children under 12 years do not use this product in children under 12 years of age
Can you take pseudoephedrine with…?
Source-cited answers for the combinations people actually ask about — each with a verdict and what to watch for.
Every pseudoephedrine product we track (5)
Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.
| # | Drug | Rating | Type | Form | Generic? | Pharmacy pays | |
|---|---|---|---|---|---|---|---|
| 1 | 70/100 | Prescription | Capsule | Generic | $8 | View → | |
| 2 | 70/100 | Prescription | Capsule | Generic | $8 | View → | |
| 3 | 70/100 | Prescription | Tablet | Generic | $8 | View → | |
| 4 | Not yet rated | Prescription | Tablet | Generic | $8 | View → | |
| 5 | Not yet rated | Over-the-counter | Tablet | Generic | $8 | View → |
What pseudoephedrine pills look like
Imprint codes, colour and shape from the FDA’s labelling data. Match the imprint on your pill — or search any imprint.
| Imprint | Strength | Colour | Shape | Maker |
|---|---|---|---|---|
| 1004 | 30 mg | red | round | — |
Combination products containing pseudoephedrine
A combination is a different drug — different dosing, different warnings. It is listed here so you can find it, not so you can substitute it.
How long pseudoephedrine keeps
No pseudoephedrine label we read sets a separate limit for after opening, but they do specify how it must be stored — and the stability behind any date assumes those conditions.
Does pseudoephedrine expire? The in-use limits and storage rules from its labelsPseudoephedrine and breastfeeding
From LactMed, the US National Library of Medicine’s Drugs and Lactation Database — quoted, not rewritten.
Full LactMed record for pseudoephedrine: levels in milk, effects in breastfed infants, and the drugs it would consider insteadAlthough the small amounts of pseudoephedrine in breastmilk are unlikely to harm the nursing infant, it may cause irritability occasionally. A single dose of pseudoephedrine decreases milk production acutely and repeated use seems to interfere with lactation. Mothers with newborns whose lactation is not yet well established or in mothers who are having difficulties producing sufficient milk should not receive pseudoephedrine. A treatment scheme has been reported for mothers with hypergalactia that uses pseudoephedrine to decrease milk supply.
National Institute of Child Health and Human Development, record revised April 20, 2026. LactMed states its information is not a substitute for professional judgement.
What people report to the FDA about pseudoephedrine
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 13,624 reports naming pseudoephedrine, and the FDA flagged 85% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- systemic lupus erythematosus5,914 reports
- rheumatoid arthritis5,891 reports
- pemphigus5,741 reports
- abdominal discomfort5,704 reports
- alopecia5,575 reports
- fatigue5,504 reports
- glossodynia5,462 reports
- rash5,151 reports
Read these as a signal, not a rate. A report does not mean pseudoephedrine caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.
Source: openFDA drug/event (FAERS), retrieved July 26, 2026.
How long pseudoephedrine stays in your system
The elimination half-life of pseudoephedrine 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). 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.
CLARINEX-D 12 HOUR (desloratadine and pseudoephedrine sulfate) extended release tablets — Section 12.3 Pharmacokinetics, DailyMed ↗Half-life is how long the body takes to clear half a dose. It is not the same as how long a drug test can detect it, and it varies with age, kidney and liver function.
Related calculators
Frequently asked questions
What is Pseudoephedrine Hydrochloride?
Uses temporarily relieves nasal congestion due to the common cold, hay fever or other upper respiratory allergies temporarily relieves sinus congestion and pressure
What kind of drug is pseudoephedrine?
The FDA classifies pseudoephedrine as an alpha-adrenergic agonist. Alpha-adrenergic agonists switch on alpha receptors on blood-vessel walls, much like the body's own adrenaline. This tightens the smooth muscle around the vessels, narrowing them to raise blood pressure or reduce swelling and congestion. If you are checking whether it is safe to combine with something else, the class is what matters — two drugs from the same class usually should not be stacked.
How long does pseudoephedrine stay in your system?
The elimination half-life of pseudoephedrine 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) — that is how long the body takes to clear half of a dose. 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. Half-life is not the same as how long a drug test can detect the drug, and it varies with age, kidney and liver function.
Can you take pseudoephedrine with other medicines?
It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run pseudoephedrine against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.
What brand names is pseudoephedrine sold under?
We track 5 pseudoephedrine-containing products in the U.S.: Novafed, Sudafed 12 Hour, Sudafed 24 Hour, Afrinol and Pseudoephedrine Hydrochloride. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.
What forms does pseudoephedrine come in?
Across the brands we track, pseudoephedrine is currently marketed as capsule, extended release, tablet, extended release and tablet, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.
Is there a generic pseudoephedrine?
Yes. Our catalog lists 1 generic pseudoephedrine product alongside the brand versions. A generic has the same active ingredient and must meet the FDA's bioequivalence standard; it usually costs less. Ask your pharmacist which one your plan covers.
What should I avoid while taking pseudoephedrine?
Other medicines: we hold source-cited interaction answers for Can you take Claritin-D and DayQuil together?. This is what the FDA label and our cited sources say — it is not a complete list. Your pharmacist can check your own combination.
Cite this page
- APA
- pharmaranks. (2026, July 24). Pseudoephedrine: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/pseudoephedrine
- MLA
- “Pseudoephedrine: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/pseudoephedrine.
We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.
Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.
Read the full FDA label for pseudoephedrine on DailyMed (NIH) ↗.