Indomethacin-d 4 Methyl Ester is the deuterium labeled Indomethacin. Indomethacin (Indometacin) is a potent, blood-brain permeable and nonselective inhibitor of COX1 and COX2, with IC50s of 18 nM and 26 nM for human COX-1 and COX-2 , respectively, in CHO cells. Indomethacin disrupts autophagic flux by disturbing the normal functioning of lysosomes.