A trial of feprazone in ankylosing spondylitis.

Feprazone, a non-steroidal anti-inflammatory drug, was compared with indomethacin in a double-blind cross-over trial in 24 patients with ankylosing spondylitis, over eight weeks. Both regimes caused significant reduction in pain. There were fewer side-effects and more patient preferences with feprazone but these differences did not reach statistical significance.