muscle spasm
"I was prescribed cyclobenzaprine following Ankle Fusion  surgery for Avascular Necrosis of the Talus. Surgeon removed a portion of the Fibula to reform a new talus(ankle) following the removal of dead bone. Taking cyclobenzaprine is very effective in keeping muscle spasms at bay. At 7 weeks following surgery, the cyclobenzaprine appears as effective as the pain medicine (hydrocodone) in allowing me to sleep through the night. I think if I had to choose one medicine Cyclobenzaprine or Hydrocodone, I would choose the Cyclobenzaprine."