Evaluation of Safety, Pharmacokinetics and Pharmacodynamics of EXPAREL® Administered Via a Single Intrathecal Injection to Healthy Volunteers

Inclusion Criteria: 1. Healthy adult male or female volunteers ages ≥18 and ≤50 years old. 2. American Society of Anesthesiologists (ASA) physical status 1. 3. Able to provide informed consent, adhere to the study schedule, and complete all study assessments. Exclusion Criteria: 1. Allergy, hypersensitivity, intolerance, or contraindication to any of the study medications for which an alternative is not named in the protocol (eg, amide-type local anesthetics, opioids, bupivacaine, non-steroidal anti-inflammatory drugs \[NSAIDs\], spinal anesthesia). 2. Impaired renal or hepatic function (eg, serum creatinine level \>2 mg/dL \[176.8 μmol/L\], blood urea nitrogen level \>50 mg/dL \[17.9 mmol/L\], serum aspartate aminotransferase \[AST\] level \>1.5 times the upper limit of normal \[ULN\], or serum alanine aminotransferase \[ALT\] level \>1.5 times the ULN). 3. Subjects at an increased risk for bleeding or who have a coagulation disorder (defined as platelet count less than 80,000 × 103/mm3). 4. Concurrent painful physical condition that may require analgesic treatment (such as long-term, consistent use of opioids) in the post dosing period for pain and which may confound the post dosing assessments. 5. Women of childbearing potential must have a documented negative pregnancy test at screening and must be confirmed on the day of drug administration. If postmenopausal, must have a documented Follicle Stimulating Hormone (FSH) test confirming menopause at screening. 6. Currently pregnant, nursing, or planning to become pregnant during the study or within 30 days after completion of the study. 7. Positive serology test result for Human Immunodeficiency Virus (HIV), Hepatitis B virus, or Hepatitis C virus. 8. Clinically significant abnormal ECG that in the opinion of the investigator would preclude the subject from participation in the study. 9. Previous participation in a Pacira study. 10. History of, suspected, or known addiction to or abuse of illicit drug(s), prescription medicine(s), or alcohol within the past 2 years. 11. Administration of an investigational drug within 30 days or 5 elimination half-lives of such investigational drug, whichever is longer, prior to study drug administration, or planned administration of another investigational product or procedure during the subject's participation in this study