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A muscle relaxant is a drug that affects skeletal muscle function and decreases the muscle tone. It may be used to alleviate symptoms such as muscle spasms , pain , and hyperreflexia . The term "muscle relaxant" is used to refer to two major therapeutic groups: neuromuscular blockers and spasmolytics .
Cyclobenzaprine, sold under several brand names including, historically, Flexeril, is a muscle relaxer used for muscle spasms from musculoskeletal conditions of sudden onset. [5] It is not useful in cerebral palsy. [5] It is taken by mouth. [5] Common side effects include headache, feeling tired, dizziness, and dry mouth. [5]
Mephenesin (), also called myanesin, [1] [2] is a centrally acting muscle relaxant.It can be used as an antidote for strychnine poisoning.Mephenesin however presents with the major drawbacks of having a short duration of action and a much greater effect on the spinal cord than the brain, resulting in pronounced respiratory depression at clinical doses and therefore a very low therapeutic index.
Methocarbamol is a muscle relaxant used to treat acute, painful musculoskeletal spasms in a variety of musculoskeletal conditions. [12] However, there is limited and inconsistent published research on the medication's efficacy and safety in treating musculoskeletal conditions, primarily neck and back pain.
Tolperisone does not have a significant potential for interactions with other pharmaceutical drugs. It cannot be excluded that combination with other centrally acting muscle relaxants, benzodiazepines or nonsteroidal anti-inflammatory drugs (NSAIDs) may make a dose reduction necessary in some patients. [3] [4]
Long-term use of muscle relaxants in such cases is poorly supported. [8] Spasm may also be seen in movement disorders featuring spasticity in neurologic conditions such as cerebral palsy, multiple sclerosis, and spinal cord disease. Medications are commonly used for spastic movement disorders, but research has not shown functional benefit for ...
It is a very potent muscle relaxant drug, with an ED95 (i.e., the dose that causes 95% depression of muscle twitch response) of only 60 μg/kg body weight. Onset of action is relatively slow compared to other similar drugs, in part due to its low dose: an intubating dose takes 3–6 minutes for full effect.
Tizanidine, sold under the brand name Zanaflex among others, is an alpha-2 (α 2) adrenergic receptor agonist, [2] similar to clonidine, that is used to treat muscle spasticity due to spinal cord injury, multiple sclerosis, and spastic cerebral palsy. [3] Effectiveness appears similar to baclofen or diazepam. [4] It is taken by mouth. [5]