Chlorzoxazone: uses, dosing, side effects & brands
Chlorzoxazone is a medicine sold in the U.S. under 3 brand and generic names. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Available as
- Tablet
- Sold as
- 3 products — Chlorzoxazone, Paraflex and Parafon Forte Dsc
- Prescription?
- Prescription only
- Generic available?
- Yes
- What the pharmacy pays
- about $16 for a 30-count supply — not your price
Every chlorzoxazone product we track (3)
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 | 74/100 | Prescription | Tablet | Generic | $16 | View → | |
| 2 | Not yet rated | Prescription | Tablet | Generic | $16 | View → | |
| 3 | Not yet rated | Prescription | Tablet | Generic | $16 | View → |
What chlorzoxazone pills look like
Imprint codes, colour and shape from the FDA’s labelling data. Match the imprint on your pill — or search any imprint.
How long chlorzoxazone keeps
No chlorzoxazone 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.
What people report to the FDA about chlorzoxazone
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 1,474 reports naming chlorzoxazone, and the FDA flagged 66% 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:
- nausea108 reports
- dizziness106 reports
- fatigue106 reports
- headache90 reports
- anxiety74 reports
- dyspnoea64 reports
- diarrhoea61 reports
- chronic kidney disease59 reports
Read these as a signal, not a rate. A report does not mean chlorzoxazone 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.
Source: openFDA drug/event (FAERS), retrieved September 25, 2026.
Related calculators
Frequently asked questions
Can you take chlorzoxazone 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 chlorzoxazone 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 chlorzoxazone sold under?
We track 3 chlorzoxazone-containing products in the U.S.: Chlorzoxazone, Paraflex and Parafon Forte Dsc. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.
What forms does chlorzoxazone come in?
Across the brands we track, chlorzoxazone is currently marketed as 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 chlorzoxazone?
Yes. Our catalog lists 1 generic chlorzoxazone 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.
Cite this page
- APA
- pharmaranks. (2026, July 24). Chlorzoxazone: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/chlorzoxazone
- MLA
- “Chlorzoxazone: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/chlorzoxazone.
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 chlorzoxazone on DailyMed (NIH) ↗.