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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.
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]
Chlorphenesin carbamate (Maolate, Musil) is a centrally acting muscle relaxant used to treat muscle pain and spasms. [1] [2] Chlorphenesin carbamate is no longer used for this purpose in most developed nations due to the availability of much safer spasmolytics such as benzodiazepines. Other central effects include sedation, anxiolysis, and ...
Meprobamate—marketed as Miltown by Wallace Laboratories and Equanil by Wyeth, among others—is a carbamate derivative used as an anxiolytic drug. It was the best-selling minor tranquilizer for a time, but has largely been replaced by the benzodiazepines due to their wider therapeutic index (lower risk of toxicity at therapeutically prescribed doses) and lower incidence of serious side effects.
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 .
Dantrolene sodium, sold under the brand name Dantrium among others, is a postsynaptic muscle relaxant that lessens excitation-contraction coupling in muscle cells. [ 5 ] [ 6 ] [ 7 ] It achieves this by inhibiting Ca 2+ ions release from sarcoplasmic reticulum stores by antagonizing ryanodine receptors . [ 8 ]
The clinical effectiveness of methocarbamol compared to other muscle relaxants is not well known. [12] One trial of methocarbamol versus cyclobenzaprine, a well-studied muscle relaxant, in those with localized muscle spasm found there were no significant differences in their effects on muscle spasm, limitation of motion, or limitation of daily activities.
Orphenadrine (sold under many brand names) [1] is an anticholinergic drug of the ethanolamine antihistamine class; it is closely related to diphenhydramine.It is a muscle relaxant that is used to treat muscle pain and to help with motor control in Parkinson's disease, but has largely been superseded by newer drugs.