Eligibility Criteria:
Inclusion Criteria:
* History of low back pain for a minimum of 6 months with or without signs and symptoms of radiculopathy
* Male or female, between the ages of 18 and 75 years, with no racial or ethnic restrictions
* Must have a Visual Analog Scale (VAS) pain score of 5 mm (of 10 mm maximum) at the screening visit (for which 0mm = no pain, and 10 mm = worst pain imaginable);
* Must be able to read and speak English and be willing to read and understand instructions as well as questionnaires;
* Must be in generally stable health;
* Must sign an informed consent document after a complete explanation of the study documenting that they understand the purpose of the study, procedures to be undertaken, possible benefits, potential risks, and are willing to participate
* Must have, on average, 5/10 units (VAS scale) of pain over the course of a two-week period prior to visit 1; rounding up from 4.5/10 is permissible.
* Must be willing to complete daily smart phone/computer app ratings.
Exclusion Criteria:
* Low back pain associated with any systemic signs or symptoms, e.g., fever, chills;
* Evidence of rheumatoid arthritis, ankylosing spondylitis, acute vertebral fractures, fibromyalgia, history of tumor in the back;
* Other comorbid chronic pain or neurological conditions;
* Involvement in litigation regarding their back pain or having a disability claim or receiving workman's compensation or seeking either as a result of their low back pain;
* Diagnosis of current depression or psychiatric disorder requiring treatment, or such a diagnosis in the previous 6 months;
* Beck Depression Inventory (BDI) Ia score greater or equal to 19 for two consecutive completions; if the first score meets this criteria, the participant must be re-tested before his/her next visit, but if the second score does not meet this criteria, the participant will be included and followed closely throughout the study
* Use of therapeutic doses of antidepressant medications (i.e., tricyclic depressants, SSRIs, SNRIs; low doses used for sleep may be allowed);
* Significant other medical disease such as unstable diabetes mellitus, congestive heart failure, coronary or peripheral vascular disease, chronic obstructive lung disease, or malignancy;
* History of gastrointestinal ulcer during the past year;
* History of myocardial infarction in the past year;
* Uncontrolled hypertension;
* Renal insufficiency;
* Allergic to, or non-tolerant of, NSAIDs;
* History of aspirin-sensitive asthma;
* Current use of recreational drugs or history of alcohol or drug abuse;
* Any change in medication for back pain in the last 30 days only applicable for visit 1
* High dose opioid prophylaxis, as defined as \> 50mg morphine equivalent/day;
* Any medical condition that in the investigator's judgment may prevent the individual from completing the study or put the individual at undue risk;
* In the judgment of the investigator, unable or unwilling to follow protocol and instructions;
* Evidence of poor treatment compliance, in the judgment of the investigator;
* Intra-axial implants (e.g. spinal cord stimulators or pumps);
* All exclusion criteria for MR safety: any metallic implants, brain or skull abnormalities, tattoos on large body parts, and claustrophobia;
* Pregnancy, or inability to use an effective form of contraception in women of child-bearing age;
* Diabetes (Type I or Type II);
* Lactose intolerance or sensitivity to lactose