A review of current research has found that oral anti-inflammatory drugs are as effective as an injection of cortisone for bringing short-term pain relief to people with tendon problems in their shoulders and elbows. Researchers found that steroid injections worked better than physical therapy, but also that common non-steroidal anti-inflammatory drugs such as naproxen were equally as effective as the shots. There have been reports that long-term use of steroid injections can actually weaken...