Q-VD(OMe)-OPh is a broad-spectrum caspase inhibitor with high activity in inhibiting apoptosis. Q-VD(OMe)-OPh is not toxic to cells at high concentrations, demonstrating its safety. Q-VD(OMe)-OPh exhibits comparable effectiveness to other widely used inhibitors in preventing apoptosis mediated by caspase 9/3, caspase 8/10, and caspase 12.