ML218 hydrochloride is a selective and orally active T-type Ca2+ channels (Cav3.1, Cav3.2, Cav3.3) inhibitor (Cav3.2 and Cav3.3 with IC50s of 310 nM and 270 nM , respectively).

Cav 3.3:270 nM , Cav 3.2:310 nM , Ca2+ flux:150 nM

Intrinsic clearance experiments in liver microsomes indicated that ML218 is highly cleared in rat (CLint = 115 mL/min/kg), but low to moderately cleared in human liver microsomes (CLint = 12.7 mL/min/kg)[1].

Free brain and plasma concentrations of ML218 increases in a dose proportional manner across the dose range (3 mg/kg: [plasma] = 98 nM, [brain] = 1.66 μM; 10 mg/kg: [plasma] = 282 nM, [brain] = 5.03 μM; 30 mg/kg: 1.2 μM, [brain] = 17.7 μM)[1].