Differential therapy of constipation--a review.
Constipation is a common condition occurring with increasing frequency in advanced age. As a symptom, it is not always dealt with directly by the physician, but is often left to the care of nurses. Many patients rely on self-medication. Constipation not only interferes with the quality of life, but often has the rank of a syndrome requiring competent medical intervention. This is of clinical importance, because a thorough understanding of the pathophysiology of constipation enables the clinician to identify the potential causes and, if necessary, initiate a differentiated therapy with the aid of only simple additional investigations. This review outlines a clinical approach including medical history, spectrum of causes, radiopaque pellets method to differentiate between slow transit constipation and defecation disturbances for the differential diagnosis of constipation. The mechanisms of action of laxatives (anti-absorptive, secretagogue, osmotic, filling and swelling agents) are further components and important for the individual therapy. Based on this fundamental information, a differentiated therapy is possible in each specific case such as coprostasis. Chronic symptomatic constipation reduces the quality of life and should be evaluated by physicians. If situations such as drug-induced constipation or hypothyroidism which have to be treated causally can be ruled out, laxative treatment according to the clinical picture, mode of action of drug used and side effects of the laxative can be initiated. Laxative abuse due to chronic constipation is rare and almost always associated with psychosomatic-psychiatric disorders.