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What Is Baclofen?
Baclofen is a GABA-B receptor agonist — it mimics the inhibitory neurotransmitter GABA at receptors in the spinal cord. By activating these receptors, it reduces the release of excitatory neurotransmitters and decreases the reflex arcs that cause involuntary muscle contractions (spasticity).
It is distinct from other muscle relaxants like cyclobenzaprine, which work primarily in the brain. Baclofen acts mainly at the spinal cord level, which makes it particularly effective for spasticity caused by neurological disease. Brand name: Lioresal.
What Does Baclofen Treat?
| Condition | FDA-Approved? | Notes |
|---|---|---|
| Spasticity in multiple sclerosis | Yes | First-line; reduces stiffness, clonus, spasms |
| Spinal cord injury spasticity | Yes | Oral and intrathecal (implanted pump) forms |
| Cerebral palsy spasticity | Off-label (oral); Yes (intrathecal) | Intrathecal pump for severe cases |
| Stroke-related spasticity | Off-label | Widely used |
| Alcohol use disorder | Off-label (evidence exists) | European guidelines support use for AUD |
| Hiccups (refractory) | Off-label | Effective for intractable hiccups |
| GERD / LES dysfunction | Off-label | Reduces transient LES relaxations |
Dosage & Titration
Baclofen must be started low and increased gradually to minimize sedation and weakness:
- Starting dose: 5 mg three times daily
- Increase: 5 mg per dose every 3 days
- Usual effective range: 40–80 mg/day in divided doses
- Maximum: 80 mg/day (some patients require up to 120 mg under specialist supervision)
Withdrawal Warning
🚨 Never stop baclofen suddenly
Abrupt discontinuation of baclofen — especially at higher doses — can cause life-threatening withdrawal including:
- High fever (hyperthermia)
- Altered mental status, confusion, hallucinations
- Severe rebound spasticity
- Seizures
- Rhabdomyolysis (muscle breakdown)
- Multi-organ failure
Always taper baclofen over weeks to months under medical supervision. If you run out of your prescription or have surgery that prevents oral intake, inform your medical team immediately.
Frequently Asked Questions
Is baclofen a narcotic or controlled substance?
Baclofen is NOT a federally scheduled controlled substance in the US. However, it does have potential for misuse (some use it recreationally for its sedating and euphoric effects, especially combined with alcohol). Its abuse potential is considered lower than benzodiazepines, but it is not without risk. Some states have additional restrictions. Always take it only as prescribed.
Can baclofen be used for back pain and muscle spasms?
Baclofen is sometimes prescribed off-label for acute musculoskeletal back pain and spasms, though it is not its primary indication. It is more effective for neurological (spastic) muscle problems than for typical musculoskeletal pain. For common back pain, other muscle relaxants (cyclobenzaprine, methocarbamol) are often chosen first. Your provider will determine what is appropriate.
What are the main side effects of baclofen?
The most common are sedation/drowsiness (most frequent — often improves with time), weakness and muscle hypotonia, dizziness, nausea, and headache. At higher doses: confusion, ataxia, urinary retention. These side effects are dose-related and usually improve if the dose is reduced or titration is slowed.
How much does baclofen cost without insurance?
Generic baclofen is very affordable — typically $10–$25 per month with a free Rx.com discount card. Compare current prices near you. Or get a prescription for Baclofen online.
Can I drink alcohol while taking baclofen?
Avoid alcohol. Both baclofen and alcohol are CNS depressants — combining them dramatically increases sedation, impairs coordination, and raises the risk of falls and respiratory depression. The interaction is serious. If you are prescribed baclofen for alcohol use disorder, your provider will discuss safe alcohol reduction strategies with you.
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