American Society of Colon and Rectal Surgeons: Constipation: A look at this disorder, and what is normal, the causes, when to see a doctor, diagnosing and treatment.
Constipation in Down Syndrome: How to fix this problem. Includes information on senna tea, magnesium, and serotonin.
Constipation Salvation: A different approach which includes the use of sweets and lubricants. Offers a survey, the results and a discussion forum.
eMedicine: Constipation: Dr. Marc Basson offers a clinical overview of acute, subacute, and chronic constipation, one of the most common gastrointestinal disorders. Includes recommendations on self-diagnosis, diet, exercise, and other lifestyle changes.
NIDDK: Constipation: A look at who gets it, the causes, diagnostic tests, treatment and how serious this is.
Pediatric OnCall: A time tested home made remedy for the treatment of constipation.
RXinsider: A free monograph on constipation for patient counseling.