Questionnaire-based evaluation of gastrointestinal disorders in de novo renal-transplant patients receiving either mycophenolate mofetil or enteric-coated mycophenolate sodium.

BACKGROUND: Gastrointestinal (GI) disorders are one of the main adverse events in patients treated by mycophenolic acid (MPA). The aim of our prospective questionnaire-based study was to assess GI side-effects in de novo renal-transplant patients receiving either mycophenolate mofetil (MMF) or enteric-coated mycophenolate sodium (EC-MPS). METHODS: Between January 2002 and April 2003, all patients receiving MPA with a functioning allograft at 1 month post-transplantation were enrolled in this study (n = 130). Ninety-three of them received MMF (group I), and 37 patients received EC-MPS (group II). Each month, every patient completed a questionnaire regarding GI disorders. RESULTS: During the first year post-transplantation, GI disorders occurred in 31 patients from the MMF group (33.3%) and 12 patients from the EC-MPS group (32.4%) (not significant). The incidence of upper GI disorders was also similar in both groups. Diarrhoea was observed in 18 patients (19.3%) from group I, and in five patients from group II (13.5%) (not significant). Its frequency and severity were similar in both groups. Weight loss was observed in three patients receiving MMF. Diarrhoea resolved spontaneously in 10 patients from group I and in all patients from group II. For the other eight patients in group I, the diarrhoea required MMF discontinuation in three patients and dose reduction in five patients. CONCLUSIONS: In conclusion, in this questionnaire-based evaluation, the incidence of GI disorders was similar in patients receiving either MMF or EC-MPS during the first year post-transplantation.