A spasm is a sudden, violent, involuntary contraction of a muscle or a group of muscles (including involuntary muscles such as in an artery, the colon, or the esophagus), attended by pain and interference with function, producing involuntary movement and distortion.

Symptom severities
Severe
43
Moderate
69
Mild
41
None
25
What patients report taking for the purpose of treating Nighttime leg spasms
Patients
Requip 6
Tizanidine 3
Valium 3
Cyclobenzaprine 2
Clonazepam 1
Amitriptyline 1
Sifrol 1
Flexeril 1
Gabapentin 1
Mirapex ER 1
Morphine 1
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