Variable

Before rifaximin

After rifaximin

P value

EEG

Normal

Abnormal

31 (51.6%)

29 (48.4%)

47 (78.33%)

13 (21.67%)

0.03

VEP P100 latency right eye

Mean ± SD

Median (range)

123.22 ± 31.35

106 (80 - 198)

110.15 ± 23.59

100.5 (90 - 177)

0.001

VEP P100 latency left eye

Mean ± SD

Median (range)

120.8 ± 26.73

105 (88 - 171)

110.28 ± 23.74

100 (90 - 187)

<0.001