Baclofen is a medication with the active ingredient baclofen. It is also known by the brand names Lioresal and Gablofen. Baclofen is used to treat muscle spasms and stiffness caused by conditions such as multiple sclerosis and spinal cord injuries. It helps relax the muscles to improve movement and reduce pain.
Baclofen costs between £0.49 and £2.74 per pills. It depends on the pack size and the amount of active ingredient (30 or 360 mg).
Baclofen belongs to the class of medications known as muscle relaxants. More specifically, it is a type of gamma-aminobutyric acid (GABA) agonist primarily used to alleviate muscle spasticity.
Baclofen’s chemical name is 4-amino-3-(4-chlorophenyl) butanoic acid. The molecular formula is C10H12ClNO2 and it has a molecular weight of 213.66 g/mol. It is a white to off-white, odorless crystalline powder, soluble in water, methanol, and alcohol.
Baclofen works by activating beta GABA receptors in the spinal cord. This activation leads to inhibition of excitatory neurotransmitter release, thereby reducing muscle spasticity. The effect is localized primarily in the central nervous system.
Baclofen is orally bioavailable. Peak plasma concentrations are typically reached within 1 to 3 hours post-ingestion. It has a half-life of 2-4 hours and is primarily excreted through the kidneys as unchanged drug.
Baclofen is indicated for the treatment of muscle spasticity associated with multiple sclerosis and spinal cord injuries. It may also be prescribed off-label for conditions like trigeminal neuralgia and hiccups.
Baclofen is usually started at a low dose, typically 5 mg taken three times daily, and gradually increased every three days until the desired effect is achieved. The maximum recommended dose is 80 mg per day in divided doses.
Baclofen is contraindicated in individuals with a history of hypersensitivity to the drug. It should not be administered intrathecally in patients with infections in the treatment area.
Baclofen may interact with other central nervous system depressants, including alcohol, benzodiazepines, and opioids, potentially leading to increased sedation. Concomitant use with antidepressants can alter its efficacy or increase adverse effects.
Common side effects include drowsiness, dizziness, weakness, and fatigue. Less common but serious adverse effects include confusion, hypotension, seizures, and hallucinations. Long-term use may lead to dependence.
Patients on Baclofen therapy should be regularly monitored for signs of muscle weakness, hypotension, and renal function. Periodic liver function tests are also recommended.
Baclofen dosing may need to be adjusted for elderly adults due to the increased risk of renal function impairment. In pregnant or breastfeeding women, Baclofen should only be used if the potential benefits justify the potential risks.
Discontinuing Baclofen should be done gradually to avoid withdrawal symptoms like seizures and hallucinations. A common tapering schedule involves reducing the dose by 10-15 mg per day over a period of weeks.
Store Baclofen at room temperature between 20-25°C (68-77°F), away from light and moisture. Keep the medication in its original container. Disposal should be carried out in accordance with local regulations.
Baclofen is available in oral tablets of 10 mg and 20 mg strengths. It is also available as an oral liquid formulation and for intrathecal administration in pump systems.
Adjustment of Baclofen dose may be necessary in individuals with renal impairment. For patients with creatinine clearance less than 50 mL/min, a reduced dosing frequency is advisable.
Clinical trials have demonstrated Baclofen’s efficacy in reducing spasticity in conditions like multiple sclerosis and spinal cord injury. Its effect on reducing spasms, clonus, and improving mobility has been well documented.
Baclofen exerts its muscle relaxant effects by binding to GABA(B) receptors, reducing neurotransmitter release in the central nervous system, and thereby dampening the nerve signals causing muscle tightness and spasticity.
In pediatric patients, Baclofen is used cautiously. Initial doses start at 0.75 to 2 mg/kg/day in divided doses, with careful monitoring for efficacy and adverse effects. Dosage adjustments depend on the child’s response.
Common inactive ingredients in Baclofen tablets include microcrystalline cellulose, magnesium stearate, and silicon dioxide, which aid in the tablet’s stability and absorption.
Alternative treatments for spasticity include tizanidine, diazepam, and dantrolene. The choice of therapy should be individualized based on patient response and tolerance to treatment.