Table 4 Cytotoxicity, antiviral effect, and selectivity index of medicinal herb extracts

CC₅₀^a (μg/mL)

EC₅₀^b (μg/mL)

SI^c

569.25 ± 13.43

1.72 ± 0.21

330.170

72.34 ± 2.21

24.77 ± 1.03

2.920

18.63 ± 0.06

2.46 ± 0.21

7.585

Plants

Extract Solvents

CC₅₀ (mg/mL)

EC₅₀ (mg/mL)

SI

 Brassica juncea

Ethanol

1.91 ± 0.11

Not effective

Not effective

Water

9.73 ± 1.40

0.71 ± 0.06

13.668

 Forsythia suspensa

Ethanol

0.02 ± 0.00

Not effective

Not effective

Water

0.10 ± 0.02

Not effective

Not effective

 Inula britannica

Ethanol

0.19 ± 0.02

Not effective

Not effective

Water

0.68 ± 0.11

Not effective

Not effective