Bivirkninger, som optrådte hos ≥ 1% og < 3% af disse patienter og hyppigere hos patienter, der fik Tracleer, end hos dem, der fik placebo (≥ 2% forskel) var stigning i leverenzymer (2, 7% for Tracleer versus 0% for placebo) og rødme (2, 47% for Tracleer versus 0, 6% for placebo).
Adverse drug reactions that occurred in ≥ 1% and < 3% of these patients and more frequently on Tracleer than on placebo (≥ 2% difference) were hepatic enzyme increased (2.7% on Tracleer versus 0% on placebo) and flushing (2.7% on Tracleer versus 0.6% on placebo).