The case of a 60-year-old female patient with watery diarrhea is repor
ted. The history was characterized by prolonged diagnostic vagaries, d
ue in part to histological features of ileal, rectal and duodenal biop
ies which were suggestive of celiac disease. This was clinically exclu
ded. After halting the intake of a compound drug containing saponins,
administered for venous insufficiency, the diarrhea ceased immediately
but could be provoked by rechallenge with the same drug. The patient
thus-had drug induced chronic diarrhea mimicking celiac disease, a con
dition which is less rare than is thought and easily diagnosed by a th
orough enquiry on drug intake.