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. 2005 Aug;54(8):1169–1173. doi: 10.1136/gut.2004.055251

Table 2.

 Adverse events

Ondansetron (n = 18) Placebo (n = 18)
Constipation 7 6
Required laxative 3 1
Headache 1 1
ALT (d0/d60) 72.8 (58.0)/61.6 (56.3) 64.5 (50.9)/68.0 (64.0)

There were no significant changes in laboratory parameters during the study, and in particular no increases in liver enzymes (alanine aminotransferase (ALT)).