Is Chlorzoxazone registered with the SFDA?

The SFDA human drug list (edition 4-2026, as published by the Council of Health Insurance) lists 1 valid registration of Chlorzoxazone, including Relaxon Forte 500MG TAB (500 mg, Tablet, SAR 24.30).

Is Chlorzoxazone approved by the US FDA?

Drugs@FDA lists 38 application product lines for Chlorzoxazone, including CHLORZOXAZONE (Prescription); CHLORZOXAZONE (Prescription); CHLORZOXAZONE (Prescription); CHLORZOXAZONE (Prescription); CHLORZOXAZONE (Prescription).

Active substance

Chlorzoxazone

SFDA 2
US FDA 38
US price lines 4

Open in the medicines table

SFDA Saudi Arabia — SFDA human drug list

Trade name	Strength	Form · route	Pack	Public price	Type	Company	Status
Relaxon Forte 500MG TAB	500 mg	Tablet · Oral use	30 Blister	SAR 24.30	Generic · Prescription	Jamjoom Pharmaceuticals Factory Company	Valid
SOLAXIN TAB 200MG	200 mg	Tablet · Oral use	100 Tablet Container	SAR 21.60	NCE · Prescription	EISAI	Withdrawn by MAH · Not Marketed

Indications — CHI Daman Drug Formulary

LOW BACK PAIN

US FDA United States — FDA approvals (Drugs@FDA)

Product	Strength	Form · route	Applicant	Status	First approved
CHLORZOXAZONE	500MG; 375MG; 750MG	tablet · oral	AUROBINDO PHARMA LTD	Prescription	4 May 1988
CHLORZOXAZONE	500MG	tablet · oral	WATSON LABS	Prescription	4 May 1988
CHLORZOXAZONE	375MG; 750MG	tablet · oral	PHARMOBEDIENT	Prescription	1 Jun 2010
CHLORZOXAZONE	250MG	tablet · oral	PHARMOBEDIENT	Prescription	24 Jun 2016
CHLORZOXAZONE	500MG	tablet · oral	NOVITIUM PHARMA	Prescription	12 Sep 2019
CHLORZOXAZONE	375MG; 750MG	tablet · oral	NOVITIUM PHARMA	Prescription	27 Nov 2019
CHLORZOXAZONE	375MG; 500MG; 750MG	tablet · oral	DR REDDYS LABS SA	Prescription	21 Jul 2020
CHLORZOXAZONE	750MG; 375MG	tablet · oral	PH HEALTH	Prescription	2 Nov 2020
CHLORZOXAZONE	250MG	tablet · oral	SENORES PHARMS	Prescription	29 Jul 2021
CHLORZOXAZONE	375MG; 500MG; 750MG	tablet · oral	RISING	Prescription	5 Apr 2022
CHLORZOXAZONE	375MG; 500MG; 750MG	tablet · oral	COREPHARMA	Prescription	20 Oct 2022
CHLORZOXAZONE	250MG	tablet · oral	AJENAT PHARMS	Prescription	24 Jan 2023
CHLORZOXAZONE	375MG; 750MG	tablet · oral	SOMERSET THERAPS LLC	Prescription	27 Jan 2023
CHLORZOXAZONE	250MG	tablet · oral	COREPHARMA	Prescription	10 Apr 2023
CHLORZOXAZONE	250MG	tablet · oral	RISING	Prescription	9 Aug 2023
CHLORZOXAZONE	500MG	tablet · oral	SENORES PHARMS	Prescription	22 Jan 2024
PARAFON FORTE DSC	500MG Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons	tablet · oral	JANSSEN R AND D	Discontinued	15 Aug 1958
CHLORZOXAZONE	250MG	tablet · oral	WATSON LABS	Discontinued	6 Oct 1981
CHLORZOXAZONE	250MG	tablet · oral	CHARTWELL RX	Discontinued	20 Sep 1983
CHLORZOXAZONE	250MG	tablet · oral	ACTAVIS ELIZABETH	Discontinued	8 May 1987
CHLORZOXAZONE	250MG	tablet · oral	RISING	Discontinued	4 May 1988
CHLORZOXAZONE	500MG	tablet · oral	BARR	Discontinued	4 May 1988
STRIFON FORTE DSC	500MG	tablet · oral	FERNDALE LABS	Discontinued	23 Dec 1988
CHLORZOXAZONE	500MG	tablet · oral	WATSON LABS	Discontinued	22 Aug 1989
CHLORZOXAZONE	500MG	tablet · oral	SUN PHARM INDUSTRIES	Discontinued	27 Sep 1990

13 more — full table

Prices — United States and England

Source	Product as listed	Price	Unit / pack	Date
US NADAC	CHLORZOXAZONE 250 MG TABLET	$2.52084	per EA	22 Jul 2026
US NADAC	CHLORZOXAZONE 375 MG TABLET	$0.66652	per EA	23 Sep 2026
US NADAC	CHLORZOXAZONE 500 MG TABLET	$0.2101	per EA	23 Sep 2026
US NADAC	CHLORZOXAZONE 750 MG TABLET	$0.67545	per EA	23 Sep 2026

NADAC: average price US retail pharmacies pay to buy the medicine. NHS Drug Tariff Part VIIIA: basic price reimbursed to pharmacies in England and Wales.

Combinations containing Chlorzoxazone

Chlorzoxazone + paracetamol

Values as published by each source: SFDA human drug list (4-2026, as published by the Council of Health Insurance; indications from the CHI Daman Drug Formulary), Drugs@FDA, EMA medicines data, Health Canada Drug Product Database (Open Government Licence – Canada), CMS NADAC, NHS Drug Tariff Part VIIIA (NHSBSA Copyright, Open Government Licence v3.0), WHO Model List of Essential Medicines (CC BY 3.0 IGO; regrouped by active substance, not created by WHO), EMA PRAC, US FDA safety-related labeling changes and MHRA Drug Safety Update (Open Government Licence v3.0). Sources and reuse. Not a substitute for the official registers or the product information.