<unk>  is an central nervous system agent, neuromuscular agent that is FDA approved for the treatment of skeletal muscle spasm.   Common adverse reactions include constipation, indigestion, nausea, xerostomia, dizziness, somnolence, and fatigue.
Cyclobenzaprine
Dihydroergotamine 
Diisopromine
Iopydol
Methylergonovine 
Tramazoline
Glycopyrronium bromide
Avacopan