The concentration of the meperidine and the normeperidine in the urine were the hightest, while the concentration of meperidine in liver is lower than that other body fluids and itssues.

• 度冷丁和去甲度冷丁在染毒家兔各脏器中含量分布除血液外与度冷丁过量致死者体内分布一致，尿中度冷丁和去甲度冷丁浓度最高，肝脏中浓度明显低于其它脏器。