Naproxen and diflunisal in osteoarthrosis.

Sixty-two patients with osteoarthrosis entered a 10-week double-blind cross-over trial of diflunisal and naproxen. Eight patients withdrew for drug-related reason, and seven for other reasons. There was no statistically significant difference in parameters of disease activity on each treatment period, but naproxen produced fewer withdrawals due to drug-related side-effects.