Sedatives acting at the brain stem or spinal cord level include:
Carisoprodol (Soma, Rela)
Chlorphenesin (Maolate)
Chlorzoxazone (Paraflex,generic)
Cyclobenzaprine (Flexeril)-- not useful for muscle spasms secondary to spinal cord injury or cerebral palsy; strong antimuscarinic and sedative effects
Metaxalone (Skelaxin)
Methocarbamol (Robaxin)
Orphenadrine (Norflex)
Katzung, B.G.., Skeletal Muscle Relaxants, in Basic and Clinical Pharmacology, (Katzung, B. G., ed) Appleton-Lange, 1998, pp 434-449;White, P. F. "Anesthesia Drug Manual", W.B. Saunders Company, 1996