Drug Class: Skeletal Muscle Relaxant | Form: Intramuscular Injection | Prescription Status: Prescription-Only (Rx) — DRAP Registered
What is Thiolax 4mg/2ml Injection?
Thiolax 4mg/2ml Injection is a prescription skeletal muscle relaxant containing Thiocolchicoside 4mg in 2ml solution, administered by intramuscular injection. It is used to provide fast relief from acute and severe muscle spasms, stiffness, and musculoskeletal pain (پٹھوں کی اکڑن اور شدید درد) when oral treatment is not sufficient or practical. The injectable form delivers Thiocolchicoside directly into the bloodstream, providing faster onset of muscle relaxation compared to capsules. It is used for acute back pain, torticollis, post-traumatic pain, and muscle contractures associated with neurological conditions.
What is Thiolax Injection Used For?
Acute and Chronic Back Pain: Relieves severe muscle spasm and stiffness in the cervical and lumbar spine causing restricted movement and pain. Torticollis (Stiff Neck): Treats painful involuntary neck muscle contractions causing the head to twist or tilt to one side. Post-Traumatic and Post-Surgical Pain: Manages muscle spasm and tension following injuries, sprains, or surgical procedures. Musculoskeletal Disorders: Provides rapid relief from acute muscle spasm and stiffness in sprains and other soft tissue injuries. Neurological Muscle Contractures: Treats abnormal sustained muscle contractions associated with neurological conditions.
How Does Thiolax Injection Work?
Thiocolchicoside acts as a competitive antagonist at GABA-A and glycine receptors in the spinal cord and central nervous system. By modulating these inhibitory receptors, it reduces the excessive excitability of motor neurons that cause involuntary muscle contractions. This lowers muscle tone, relieves spasm, and restores normal movement. The intramuscular route allows the medicine to act faster than oral capsules, making the injection particularly suitable for acute and severe muscle spasm that requires rapid relief.
Dosage and Administration
| Situation | Dose | Frequency |
|---|---|---|
| Acute muscle spasm and pain | 4mg (2ml) by intramuscular injection | Twice daily |
| As prescribed | Follow doctor's instructions | Do not self-administer |
This injection must be administered by a qualified healthcare professional. It is given as a deep intramuscular injection. Do not exceed the prescribed dose or duration of treatment.
Active Ingredient
| Ingredient | Role |
|---|---|
| Thiocolchicoside 4mg | Skeletal muscle relaxant — acts on GABA receptors to reduce muscle spasm, stiffness, and pain |
Who Should NOT Use Thiolax Injection?
Do not use if you have a known allergy to Thiocolchicoside or Colchicine-derived medicines. This medicine must not be used during pregnancy as it has shown potential for harm to the unborn baby. Tell your doctor if you have liver or kidney disease or a history of seizures. Women of childbearing age must use effective contraception during treatment.
Side Effects
Common: Dizziness, drowsiness, nausea, mild pain or redness at the injection site. Serious (seek immediate help): Severe allergic reaction including facial swelling, skin rash, or difficulty breathing. Significant muscle weakness. Seizures in patients predisposed to convulsions.
Storage
Store below 25°C in a dry place away from direct sunlight. Do not freeze. Keep out of reach of children (بچوں کی پہنچ سے دور رکھیں). Do not use after the expiry date. Use immediately once the ampoule is opened.
Frequently Asked Questions
How quickly does Thiolax Injection work compared to Thiolax capsules?
The intramuscular injection delivers Thiocolchicoside directly into the bloodstream, producing faster muscle relaxation than oral capsules. Most patients experience noticeable relief within 30 to 60 minutes of injection, making it the preferred option for acute and severe muscle spasm.
Can Thiolax Injection be used during pregnancy?
No. Thiolax Injection is contraindicated during pregnancy. Thiocolchicoside has demonstrated potential genotoxic effects in studies and must not be used by pregnant women or women who may be pregnant. Discuss safe alternatives with your doctor.
Medical Disclaimer: This description is for informational purposes only and does not replace professional medical advice. This medicine must be administered only by a qualified healthcare professional. Always follow your doctor's prescription and instructions.
DRAP Registered | Prescription Required (Rx) | Muscle Relaxant | Skeletal Muscle Spasm and Musculoskeletal Disorders