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We performed a 12-month clinical trial to compare the relative effectiveness of an intermittent 5-ASA regimen and a continuous 5-ASA regimen for the maintenance treatment of patients with ulcerative colitis in remission. Fifty patients with ulcerative colitis in remission for a minimum period of 1 month participated in the study. Twenty five patients received an intermittent treatment with 5-ASA tablets (2.4 g for the first week of each month) and 25 received a continuous treatment with tablets (1.6 g each day). Patients were assessed clinically every two months and endoscopically every 6 months. Our results show that the two treatments were equally effective. The relapse-free rates at 12 months were 71% in patients receiving the intermittent treatment and 66% in patients given the continuous treatment. This difference is not statically significant. Further studies are needed to assess whether the intermittent regimen can be an alternative to life-long treatment in patients who have maintained remission for a long period of time.

Ulcerative colitis (UC) is a disease condition which typically affects young people; pregnancy is therefore frequent in women with this disease. 5-aminosalicylic acid (5-ASA) is known to be efficacious in maintaining remission of UC, but its safety in pregnancy has not yet been established. In the present study, the safety of 5-ASA was assessed in 16 women with UC (mean age: 31 years, range 25-35) who had a total of 19 pregnancies over the period from 1988 to 1992. All the patients were in clinical remission of UC at the beginning of pregnancy and were receiving a regular maintenance therapy with 5-ASA (ASACOL tablets, 1.2 g/day). During pregnancy, 4 women had a clinical relapse requiring treatment with higher doses of 5-ASA and, in some cases, with steroids. Our observations confirm that the treatment with 5-ASA does not affect the course of pregnancy nor does it damage the fetus, but it can protect from recurrences of UC.