In the differential diagnosis of gastrointestinal disturbances the possibility of laxative abuse is considered either too late or not at all. The sequel is a protracted course of illness with a series of expensive and fruitless investigations. On the basis of three recently observed cases of laxative-induced diarrhea the problems of diagnosis and management are discussed. Methods of securing early diagnosis are mentioned. The overall prognosis must be considered unfavorable. The importance is stressed of long-term follow-up of these patients at community level, to ensure timely intervention should complications arise and to prevent further unnecessary investigations.