Delivra-Celecoxib 8% Cream and Osteoarthritis

Inclusion Criteria: 1. Males or Females age 30 to 75. 2. Written informed consent 3. Patients with primary osteoarthritis (with radiological evidence) of the knees who have been prescribed Del-Cel. 4. On stable pain therapy with an oral or topical NSAID or acetaminophen. 5. Able to read and understand English to answer pain assessment questions independently. 6. Willing and able to fulfill the requirements of the study, including complete scheduled follow-up phone visits. Exclusion Criteria: 1. Secondary OA of the study knee 2. History of pseudo gout or inflammatory flare-ups 3. Major surgery or previous damage to the study knee at any time, or minor knee surgery to the study knee within 1 year of visit 1. 4. Requires oral or intra-muscular corticosteroids or received an intra articular corticosteroid injection into the study knee within the past 90 days of visit 1, or into any other joint within the past 30 days of visit 1, or currently applying topical corticosteroids onto the study knee. 5. Received intra-articular viscosupplementation (eg, hylan G-F 20 \[Synvisc®\]) in the study knee in the past 6 months of visit 1. 6. On prior stable therapy (ie, more than 3 days per week for the previous month) with an opioid analgesic prior to the screening visit will be excluded. 7. Previously withdrawn from this study 8. History of fibromyalgia 9. Other painful or disabling conditions affecting the knee or leg, or disabling condition of the hands (used to apply the study drug) 10. Skin disorder with current involvement on the hands (used to apply the study drug) or the knee(s) (application site) 11. Referred to an orthopedic surgeon for consideration of, or been advised to have, knee replacement or knee reconstruction surgery 12. Radiologic evidence of OA of the knee advanced to the point that all cartilage has been eroded (ie, bone on bone) 13. Recently started using a cane within the past 30 days prior to visit 1. 14. History of chronic headaches, or other condition, that may require more than occasional use of rescue medication, e.g.: acetaminophen. Subjects that do not meet all the enrollment criteria may not be enrolled. Any violations of these criteria must be reported in accordance with IRB Policies and Procedures.