Predictors of Opioid Analgesic Responses Study
This study will focus on differences between both healthy people and people with lower back pain in how they respond to brief laboratory pain tasks while taking morphine, taking a substance that blocks the natural opioid-based pain systems in the body (naloxone), and while taking a placebo. You will receive compensation for your time and travel.
In order to participate you must meet the following criteria:
- Have had low back pain for at least six months or are healthy.
- Are 18 to 55 years of age.
You will be excluded from the study if any of the following criteria apply to you:
- Have cancer or rheumatoid arthritis.
- Have other severe medical or psychiatric disorders.
This is a partial list of eligibility requirements.