Table 1 IC₅₀ values (μg/mL) of ferric reducing power, DPPH, PDE-5, arginase, ACE and AChE inhibitory activities in rat penile and testicular tissue by O. gratissimum leaf extracts and standard drugs/inhibitors

Penis

43.19 ± 0.02^c

46.12 ± 0.15^c

44.23 ± 0.71^a

55.51 ± 0.45^a

–

–

Testes

44.67 ± 0.01^b

49.12 ± 0.12^b

53.99 ± 0.85^a

60.03 ± 0.34^a

–

–

Sildenafil (μg/mL)

26.65 ± 0.10^a

–

–

–

–

–

L-NOHA (μg/mL)

–

42.48 ± 0.21^a

–

–

–

–

Lisinopril (μg/mL)

–

–

38.34 ± 0.01^a

–

–

–

Prostigmine (μg/mL)

–

–

–

48.01 ± 1.02^a

–

–

Vitamin C (μg/mL)

–

–

–

–

46.16 ± 0.51^a

53.81 ± 0.02^a

O. gratissimum extract

–

–

–

–

56.55 ± 0.78^a

69.41 ± 0.01^a