Dose Response Study of Dexamethasone in Combination With Bupivacaine 0.25%

Inclusion Criteria: 1. Patients aged 18 to 70 scheduled for primary shoulder arthroscopy who have already elected to receive and are eligible for regional anesthesia (brachial plexus nerve block) prior to consenting for study. 2. Ability to sign informed consent. 3. Ability to follow study protocol, and speak, read and write in English. 4. Must have valid phone number for follow-up purpose. 5. Must be able to receive all protocol medications to include the dexamethasone, ketorolac, hydromorphone, and percocet. Exclusion Criteria: 1. Patient younger than 18 years old and older than age 70 2. Patient refusal to sign consent 3. Chronic opioid use (defined as narcotic use longer than 3 months) as documented in patient's medical record 4. Allergy to any of the protocol medications 5. Patients with severe lung disease, contra lateral phrenic nerve injury, insulin-dependent diabetes, hepatic disease/failure, kidney disease/failure as documented in patient's medical record 6. Pregnancy (positive urine pregnancy test result in Preop area on morning of surgery)