Keywords hydroxyl radical/pharmacology;pain threshold/drug effects;receptors;N-methyl-D-aspartate;prostaglandins E;verapamil;

• 羟自由基/药理学;痛阈/药物作用;受体;N-甲基-D-天（门）冬氨酸;前列腺素E类;维拉帕米;