Compound

Dose

Immobility time

Saline

-----

37.12 ± 5.91

Zinc sulfate

10 mg/kg

34.70 ± 7.32

Zinc sulfate

20 mg/kg

35.18 ± 5.64

Zinc sulfate

30 mg/kg

29.42 ± 4.16*

Zinc sulfate

40 mg/kg

27.40 ± 4.20*