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Table 3 Effect of aqueous extract of burdock roots on penile reflexes (test for potency)

From: Effect of aqueous extract of Arctium lappa L. (burdock) roots on the sexual behavior of male rats

Parameter Mean frequency ± S.E.M.
  Control Burdock extract 300 mg/kg Burdock extract 600 mg/kg Burdock extract 1,200 mg/kg Viagra (60 mg/kg)
Erection 6.6 ± 0.9 8.0 ± 1.1 10.2 ± 1.2* 11.2 ± 1.3** 12.4 ± 1.1**
Quick flips 5.2 ± 0.9 6.8 ± 0.9 8.6 ± 1.2* 9.8 ± 1.2** 11.4 ± 1.4**
Long flips 2.3 ± 0.4 3.4 ± 0.8 4.6 ± 0.8* 7.8 ± 1.1** 8.2 ± 0.9**
Total penile reflex 14.1 ± 2.2 18.2 ± 2.8 23.4 ± 3.2* 28.8 ± 3.6** 32.0 ± 3.4**
  1. S.E.M.: mean standard error. n = 6 (number of animals in each group), significant difference from control, significance level: *p < 0.05, **p < 0.01.
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