What are the side effects that are associated with celecoxib ?

Same as other NSAID: The adverse effects with Celebrex (celecoxib) are the same as all the nsids...Namely GI irritation, fluid retention or allergic reaction.

Many but minor: Many but minor-most commonly constipation. Celebrex (celecoxib) is a sulfa derivative and may cross react with other sulfa allergies, in some cases violently; may cause increased BP esp in combination with ace inhibitors; some cases of steven-johnson syndrome with shedding of skin, but very rare; a very slight increase in GI events, rare. Doesn't thin blood, higher chance of mi or stroke, rarely.

Generally fewer: Celebrex (celecoxib) is a cox-2 specific nsaid. As such, it reduces pain and inflammation, with far fewer side effects than non cox-2 specific agents. Less GI upset, fewer bleeding issues, etc. In general, the safest NSAID out there.