Thiocolchicoside: uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Thiocolchicoside is a muscle relaxant for painful spasm, often combined with an NSAID. It belongs to the Muscle relaxant group. These ease muscle spasm and stiffness in back pain, neck pain and muscle injuries.

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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

Painful muscle spasm with back pain
Neck pain with muscle spasm
Short-term add-on to pain relievers

Common brand names

India: Myoril, Thiobax, Miothin
Worldwide: Muscoril

Common side effects

Diarrhoea or stomach upset
Nausea
Drowsiness (uncommon)
Skin itching or rash

Before taking it — precautions

Use only for a short time; prolonged use is avoided because of a possible genetic-damage risk seen in lab studies
Must not be used in pregnancy, breastfeeding or by women who could become pregnant without contraception
Tell your doctor about epilepsy or liver disease

When to see a doctor urgently

Swelling of face, lips or throat or trouble breathing (urgent)
Fits or seizures
Yellow eyes or skin, or severe diarrhoea

Not a prescription — no dose shown. The right dose of thiocolchicoside 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 is thiocolchicoside only used for a few days?

Lab studies suggested a possible risk of chromosome damage at high exposure, so regulators limit it to short courses.

Is it often combined with painkillers?

Yes, it is commonly combined with an anti-inflammatory painkiller for back and neck spasm.

Does thiocolchicoside cause drowsiness?

It usually causes less drowsiness than many other muscle relaxants, but some people still feel sleepy.

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Sources & further reading

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.