What do systematic reviews say?

Sulphasalazine vs placebo

Sulphasalazine showed no clear difference in clinical relapse compared with placebo (low certainty).

• Oral 5‐aminosalicylic acid for maintenance of surgically‐induced remission in Crohn's disease 2019 · Cochrane Headline outcomes only
  RR 0.88 [0.56, 1.38]
  2 studies · 298 participants
  Low