The Study of Analgesic Effects of Leonurus cardiaca L. in Mice by Formalin, Tail Flick and Hot Plate Tests

Figure 1

Effects of normal saline, morphine (10 mg/kg), and ethanolic extract of Leonurus cardiaca (125, 250, and 500 mg/kg) on the licking time in early and late phases of formalin test. Data are presented as mean ± S.E.M. *Significant with late phase of normal saline group (). **Significant with early phase of normal saline group ().