Baclofen is not classified as a controlled substance in the United States [1]. It is a muscle relaxant and antispasmodic medication [2].
How does baclofen work?
Baclofen is a gamma-aminobutyric acid (GABA) derivative that acts as an agonist at GABA-B receptors [3]. By stimulating these receptors, it inhibits polysynaptic reflexes at the spinal level, leading to muscle relaxation and a reduction in spasticity [3][4].
What conditions is baclofen used to treat?
Baclofen is primarily prescribed to manage spasticity associated with conditions such as multiple sclerosis, spinal cord injuries, and other neurological disorders [2][4]. It helps to alleviate symptoms like muscle stiffness, spasms, and pain [2].
Are there any side effects of baclofen?
Common side effects of baclofen can include drowsiness, dizziness, weakness, fatigue, and confusion [2][5]. Less common side effects may involve nausea, headache, and changes in blood pressure [5]. Abrupt discontinuation of baclofen can lead to serious withdrawal symptoms, including hallucinations, seizures, and rebound spasticity [6].
What is the difference between baclofen and other muscle relaxants?
Unlike some other muscle relaxants, baclofen does not have a direct effect on skeletal muscle. Its mechanism of action is central, targeting GABA receptors in the brain and spinal cord [3][4]. Other muscle relaxants may have different pharmacological profiles and potential side effect profiles [7].
How is baclofen prescribed and administered?
Baclofen is typically taken orally in tablet form, with dosages adjusted based on individual patient needs and response [2]. In some cases, particularly for severe spasticity, an intrathecal baclofen pump may be used for continuous administration directly into the spinal fluid [4].