Robinax
✅ Relieves muscle spasms
✅ Muscle relaxant
✅ Alleviates pain
✅ Verbeterd mobiliteit
✅ Effective skeletal muscle treatment
Robinax contains Methocarbamol.
✓ Medisch beoordeeld door Morgan Ellis — Apotheekonderzoeker · 8 jaar ervaring · Laatst beoordeeld: mei 2026
⚡ Quick Answer — What is Robinax?
Robinax is een methocarbamol 500 mg tablet, a centrally-acting skeletal muscle relaxant used for acute painful musculoskeletal conditions — low back pain, muscle strain, spasm, and soft-tissue injury. Typical adult dose is 1,500 mg (three tablets) four times daily for the first 2–3 days, stepping down to 750–1,500 mg four times daily as symptoms improve. Methocarbamol is one of the lower-sedation muscle relaxants; it is often preferred when patients need to stay alert during the day.
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Robinax 500 mg is a tablet form of methocarbamol, a centrally-acting skeletal muscle relaxant first introduced in the 1950s. It is a widely used option for the acute management of musculoskeletal pain with spasm — alongside physiotherapy, NSAIDs, and (where appropriate) short-course paracetamol.
Methocarbamol’s clinical niche is similar to metaxalone (Flexura) — patients who need symptomatic control of painful muscle spasm without heavy sedation. Compared with cyclobenzaprine (Flexabenz), methocarbamol is usually less drowsy, less anticholinergic, and less likely to interact with SSRIs or tramadol. Compared with benzodiazepines, it has no addictive potential and no respiratory-depressant effect.
What Is Robinax Used For?
- Acute low back pain with muscle spasm
- Acute neck pain, cervical strain, torticollis
- Muscle strain and sprain — shoulder, trunk, leg muscles
- Post-traumatic muscle spasm (whiplash, soft-tissue injury)
- Myofascial pain syndrome — adjunct
- Tension-type headache with prominent cervical muscle component
- Tetanus (as adjunct, hospital setting)
Methocarbamol is niet indicated for spasticity from upper motor neuron disease (multiple sclerosis, cerebral palsy, spinal cord injury), for which baclofen or tizanidine are preferred.
How Does Methocarbamol Work?
Methocarbamol depresses polysynaptic reflexes in the spinal cord and reticular formation, reducing the excitatory drive to alpha motor neurons. This lowers the involuntary protective muscle contraction that develops around a painful musculoskeletal injury. It does not act directly on muscle fibres, the neuromuscular junction, or specific neurotransmitter receptors — it is a general CNS depressant with a relatively selective muscle-relaxant effect at clinical doses.
Robinax Dosing
- Adults, first 48–72 hours: 1,500 mg (three 500 mg tablets) four times daily
- Onderhoudsdosis: step down to 750–1,500 mg four times daily (4,000 mg total daily dose is often sufficient after the first few days)
- Maximum: 8 g/day (16 tablets) as divided doses — reserved for the first 48 hours only
- Duration: short course — typically 5 to 14 days
- Ouderen: start at 500–750 mg three to four times daily; titrate carefully; renal clearance is reduced
Take tablets with water, with or without food. Swallow whole. If you miss a dose, take it when you remember unless the next dose is due within 2 hours — then skip.
CNS depression warning. Methocarbamol causes drowsiness, dizziness, and slowed reaction time. Effects are stronger with alcohol, opioids, benzodiazepines, sleeping tablets, anti-anxiety medication, and older antihistamines. Do not drive or operate machinery until you know how you respond. Most patients tolerate daytime dosing after 1–2 days of adjustment.
Who Should Not Take Robinax?
- Known hypersensitivity to methocarbamol
- Severe renal impairment (drug clearance is reduced)
- Myasthenia gravis
- Concurrent use of pyridostigmine or other cholinesterase inhibitors (methocarbamol can interfere)
- Pregnancy and breastfeeding (insufficient data)
- Children under 12 years (except in tetanus, under specialist care)
Bijwerkingen
- Vaak voorkomend: drowsiness, dizziness, light-headedness, headache, nausea, lack of coordination
- Minder vaak voorkomend: rash, pruritus, mild hypotension, bradycardia, blurred vision, nasal congestion, urine discolouration (brown, black, or green; harmless metabolite)
- Zeldzaam maar ernstig: severe allergic reactions (urticaria, angioedema), seizures (reported with rapid IV administration), anaphylaxis
Robinax vs Other Muscle Relaxants
| Geneesmiddel | Typical dose | Sedation | Beste voor |
|---|---|---|---|
| Robinax (methocarbamol) | 1,500 mg QID x 2-3 days, then 750-1,500 mg QID | Low to moderate | Acute muscle spasm, daytime use |
| Flexura (metaxalone) | 800 mg TID-QID | Low | Acute spasm, low-sedation need |
| Flexabenz (cyclobenzaprine) | 5 mg TID | Hoog | Short course, bedtime dose |
| Tizanidine | 2-4 mg TID | Moderate-high | Spasticity (MS, stroke) |
| Baclofen | 5-20 mg TID | Moderate | Spasticity (upper motor neuron) |
Bestellen & Levering
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Medisch disclaimer. The information on this page is provided for general education only. It is not a substitute for advice from your own doctor or pharmacist. Talk to a qualified healthcare professional before starting, stopping, or changing therapy, especially if you have a history of ulcer disease, heart disease, kidney disease, asthma, liver disease, or are pregnant.
Veelgestelde vragen
What is Robinax used for?
Robinax (methocarbamol 500 mg) is used for acute muscle spasm associated with musculoskeletal injury — low back pain, neck pain, torticollis, muscle strain, and post-traumatic soft-tissue injury. It is a short-course medicine.
How does Robinax compare to cyclobenzaprine?
Both are centrally-acting muscle relaxants. Robinax (methocarbamol) is usually less sedating and has fewer anticholinergic effects and fewer SSRI/tramadol interactions than cyclobenzaprine. Cyclobenzaprine may be more effective for strong spasm but causes significantly more drowsiness.
How long does Robinax take to work?
Muscle-relaxing effect is usually noticeable within 30–60 minutes of the first dose; full effect at 1–2 hours. Day-to-day symptomatic improvement builds over the first 3 days.
Does Robinax cause drowsiness?
Yes — drowsiness is the most common side effect. It is usually less intense than with cyclobenzaprine. Most patients adjust within 1–2 days, but avoid driving and alcohol until you know how you respond.
How long can I take Robinax?
Typical course is 5 to 14 days. Muscle relaxants are short-course medicines — if pain persists beyond 2–3 weeks, the underlying problem needs reassessment.
Can I take Robinax with ibuprofen or paracetamol?
Yes. Muscle relaxants are commonly combined with NSAIDs (ibuprofen, diclofenac) or paracetamol for combined pain and spasm management.
Can I drink alcohol on Robinax?
Avoid alcohol. It amplifies the drowsiness, dizziness, and fall risk.
My urine has turned dark or greenish. Is that normal?
Yes — methocarbamol has a harmless metabolite that can colour urine brown, black, or green. It reverses once the medication is stopped. It is not blood.
Is Robinax addictive?
No. Methocarbamol is not a controlled substance and does not cause physical dependence.
Is Robinax safe in pregnancy?
Data are limited. Avoid in pregnancy and breastfeeding unless your doctor considers the benefit clearly outweighs the risk.
What if I miss a dose of Robinax?
Take it when you remember unless the next dose is due within 2 hours. Never double up.
Zie ook: Synaptol 150 mg — tolperisone alternative when cyclobenzaprine sedation is unacceptable — centrally acting without H1 antihistamine drowsiness.
Patients moving from short-course Robinax (methocarbamol) to longer-term spasticity management often switch to Synaptol (tolperisone 50 mg), a non-sedating centrally-acting alternative used for chronic spasm and post-stroke recovery.
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| Sterkte | 500 mg |
|---|---|
| Hoeveelheid | 30 Tabletten, 60 Tabletten, 90 Tabletten, 180 Tabletten |
Robinax
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