27 patients with ascertained ankylosing spondylitis experiencing constant after-midnight-pain received , following three medication-free days , in a double blind , randomized , cross-over fashion indometacin ( 100 g/day ) and d-2- ( 6'-methoxy-2'-naphthyl ) -propionic acid ( naproxen ) ( 500 mg/day ) , as suppositories , for a period of six days each .
C0030193
pain
C0027396
naproxen