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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.
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| Reason | # Patients | Percentage of patients | |
|---|---|---|---|
| Clonazepam | 1 | 2% | |
| MRI | 1 | 2% |