Acyclovir: the potential exist for two drugs to compete for tubular secretion, further increasing the concentrations of both drugs.
Antacids with magnesium and aluminum hydroxides: absoption of mycophenolate mofetil was decreased when administered with antacids.
Cholestyramine: should be used during concomitant administration or with drugs that interfere with enterohepatic circulation (see Precautions).
Tacrolimus: for patients on tacrolimus, the dose of cellcept should not exceed 1 g twice a day.
Live vaccines: live vaccines should not be given to patients with an impaired immune response. The antibody response to other vaccines may be diminished (see Precautions).