Mefenamic Acid (CI-473; CN-35355; CI 473; CN 35355; Mefenamic Acid; Ponstel; Parkemed; Coslan), a nonsteroidal anti-inflammatory drug (NSAID), is potent, nonselective, competitive inhibitor of the enzymes COX-1 and COX-2 with anti-inflammatory activity.

Aspirin (Acetylsalicylic acid; ASA; Acetylin; Claradin), a widely used analgesic and a salicylate analog, is a non-selective and covalent/irreversible inhibitor of COX1 and COX2 enzymes with a broad range of biological activities such as anti-inflammatory and pain relieving effects.

Xanthohumol, a naturally occuring prenylated chalcone compound isolated from hops (the female inflorescences of Humulus lupulus), is an inhibitor of COX-1 and COX-2 enzymatic activity and shows chemopreventive effects as well as anti-cancer and anti-angiogenic activities.

Acetaminophen (APAP; NSC-3991; NSC-109028; Paracetamol, Tylenol; 4′-Hydroxyacetanilide; 4-Acetamidophenol), a pain reliever and a fever reducer, is a potent and non-selective COX inhibitor with IC50s of 113.7 μM and 25.8 μM for COX-1 and COX-2, respectively.

Diclofenac diethylamine is a potent nonsteroidal anti-inflammatory drug (NSAID), acting as a non-selective COX inhibitor with IC50 of 0.5 μg/ml and 0.5 μg/ml for COX-1 and -2 in intact cells, respectively, used to relieve pain and reduce swelling in flammation.

Nimesulide (formerly R-805; R 805; R805), a non-steroidal anti-inflammatory drug (NSAID), is a potent and selective COX-2 inhibitor with analgesic and antipyretic properties.