Women who are able to have children must have been using adequate birth control since their last period. Adequate birth control must also be used during the study. Adequate birth control methods include "the pill," a patch or implant, an intrauterine device (IUD), or any barrier method combined with a spermicide.
People with RA who are taking a diseasemodifying antirheumatic drug (DMARD) such as methotrexate, hydroxychloroquine, gold, sulfasalazine, or azathioprine or an oral steroid such as prednisone must be taking the same drug for 3 months with no change in dose for 1 month.

What is the Purpose of the Precision Study
The PRECISION Study is a research
study that will compare 3 approved medicines commonly used to treat pain
in people who have osteoarthritis (OA)
or rheumatoid arthritis (RA).
The 3
medicines are
All 3 drugs are approved pain relievers called nonsteroidal anti-inflammatory drugs, or NSAIDs. Doctors refer to ibuprofen and naproxen as traditional NSAIDs, but they refer to Celebrexas a COX-2 inhibitor. That's because Celebrex blocks (or inhibits) a certain enzyme in the body called COX-2 that causes pain and inflammation.
Recently, there have been some questions raised about the safety of both COX-2–selective inhibitors and traditional NSAIDs in people who have or are at high risk for heart disease. The PRECISION Study will help answerthese questions. The study will help doctors know more about the long-term safety of these medicines on the heart. The PRECISION Study will help provide the information doctors need to choose the most appropriate pain reliever for their patients with OA or RA who have or are at high risk for heart disease.