D-Cl-amidine, administered by iv at a dose of 2.5 mg/kg, is still detected after 2 h in serum at a concentration of ~21 nM and at 4 h at ~10 nM. D-Cl-amidine is still observed in the blood serum at a concentration of ~10 nM at 4 h when administered by ip at a dose of 10 mg/kg[1].