Classification of NSAIDs based on the functional groups.

Class	Examples	Skeletal structure
Oxicams	Lornoxicam, meloxicam, piroxicam
Salicylates	Aspirin, diflunisal
2-Aryl propionic acids (profens)	Naproxen, ibuprofen, ketoprofen, flurbiprofen
Arylalkanoic acids	Etodolac, indomethacin, acemetacin, diclofenac
Pyrazolidine derivatives	Sulfinpyrazone, azapropazone
N-Aryl anthranilic acids (fenamic acids)	Mefenamic acid, meclofenamic acid
Sulphonanilides	Nimesulide
Fluorinated benzene sulphonamide (Coxibs)	Celecoxib, rofecoxib, valdecoxib