Can ketoprofen and Celecoxib be used together?

Nonsteroidal Anti-Inflammatory Agents may enhance the adverse/toxic effect of NSAID (COX-2 Inhibitor).

The prescribing information for both celecoxib and etoricoxib recommends avoiding concurrent use with any other NSAID due to an increased risk for adverse reactions,

So.. Concurrent use of another NSAID together with a COX-2 inhibitor is not recommended and should be avoided.