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Chlorzoxazone: uses, side effects & brands
Chlorzoxazone relieves muscle spasm from strains and sprains. It belongs to the Muscle relaxant group. These ease muscle spasm and stiffness in back pain, neck pain and muscle injuries.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Muscle relaxant |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Muscle spasm from strains and sprains
- Back pain with spasm (short-term)
- Often combined with a pain reliever
Common brand names
- India: Parafon, Myogesic
- Worldwide: Parafon Forte
Common side effects
- Drowsiness
- Dizziness
- Stomach upset
- Orange or reddish urine (harmless)
Before taking it — precautions
- Tell your doctor about liver disease; rare liver injury has occurred
- Avoid alcohol and other sedatives
- Tell your doctor if pregnant or breastfeeding
When to see a doctor urgently
- Yellow eyes or skin, dark urine or severe tiredness (liver injury, urgent)
- Swelling of face or throat or trouble breathing (urgent)
- Severe rash or hives
Not a prescription — no dose shown. The right dose of chlorzoxazone depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.
Frequently asked questions
Why has my urine changed colour?
Chlorzoxazone can turn urine orange or purplish-red. This is harmless.
Is it combined with paracetamol?
Yes, it is often sold combined with paracetamol or other pain relievers; check labels to avoid taking extra paracetamol.
Can I drive while taking it?
It can cause drowsiness. Avoid driving until you know how it affects you.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.