Modifying Virtual Reality Analgesia With Low-Dose Pain Medication

Inclusion Criteria: * Healthy male and females between the age of 18 and 60 years * Ability to communicate orally * Ability to read and understand English * Body Mass Index between 20-35 Exclusion Criteria: * Women who are pregnant, trying to become pregnant, or who are breastfeeding * History of alcohol or substance abuse * Major medical illness; including history of migraine headaches, seizures, brain injury, or peripheral neuropathy * Current use of analgesics including acetaminophen, non-steroidal anti-inflammatories, or opioids * Predisposition to severe motion sickness * Unusual sensitivity or lack of sensitivity to pain * Urine toxicology positive for opioids or benzodiazepines