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Dantrolene, although thought of primarily as a peripherally acting agent, is associated with CNS effects, whereas baclofen activity is strictly associated with the CNS. Muscle relaxants are thought to be useful in painful disorders based on the theory that pain induces spasm and spasm causes pain.
Cyclobenzaprine has been found not to be inferior to tizanidine, orphenadrine, and carisoprodol in the treatment of acute lower back pain, although none have been proven to be effective for long-term use (beyond two weeks of treatment). No differences in pain or spasm scores were noted among these agents, nor when compared to benzodiazepines. [18]
Effectiveness has not been clearly shown for metaxalone, methocarbamol, chlorzoxazone, baclofen, or dantrolene. [7] Applicable conditions include acute back [8] or neck pain, or pain after an injury. Long-term use of muscle relaxants in such cases is poorly supported. [8]
Baclofen, sold under the brand name Lioresal among others, is a medication used to treat muscle spasticity, such as from a spinal cord injury or multiple sclerosis. [ 8 ] [ 9 ] It may also be used for hiccups and muscle spasms near the end of life, [ 9 ] and off-label to treat alcohol use disorder [ 10 ] [ 11 ] or opioid withdrawal symptoms. [ 12 ]
An equianalgesic chart is a conversion chart that lists equivalent doses of analgesics (drugs used to relieve pain). Equianalgesic charts are used for calculation of an equivalent dose (a dose which would offer an equal amount of analgesia) between different analgesics. [1]
Side effects of thiocolchicoside can include nausea, allergy and vasovagal reactions. [15] Liver injury, pancreatitis, seizures, blood cell disorders, severe cutaneous disorders, rhabdomyolysis, and reproductive disorders have all been recorded in the French and European pharmacovigilance databases and in the periodic updates that the companies concerned submit to regulatory agencies.
Also, post-operative pain is associated with depolarizing blockers. The tetanic fade is the failure of muscles to maintain a fused tetany at sufficiently high frequencies of electrical stimulation. Non-depolarizing blockers have this effect on patients, probably by an effect on presynaptic receptors.
Back pain (Latin: dorsalgia) is pain felt in the back. It may be classified as neck pain (cervical), middle back pain (thoracic), lower back pain (lumbar) or coccydynia (tailbone or sacral pain) based on the segment affected. [1] The lumbar area is the most common area affected. [2]