Tolmetin sodium dihydrate, a non-steroidal anti-inflammatory drug (NSAID), is a potent and orally active inhibitor of COX (cyclooxygenase). Its IC 50 values for humanCOX-1 and COX-2 are 0.35 μM and 0.82 μM, respectively [1] [2].
Indomethacin-D4 is a deuterium labeled Indomethacin. Indomethacin is a potent and nonselective inhibitor of COX1 and COX2, with IC50s of 18 nM and 26 nM for humanCOX-1 and COX-2, respectively, in CHO cells.