Dexamethasone and Lower Extremity Block Duration

Dexamethasone has shown to prolong upper extremity blocks. No one ha studied its effect on lower extremity blocks. The study would evaluate that point.

Inclusion Criteria:

1. Age 18-75
2. foot surgery
3. no contraindication to regional anesthesia

Exclusion Criteria:

1. opioid dependent
2. chronic pain condition
3. peripheral neuropathy