Evaluation of Cassia Fistula + Senna Alexandrina Miller in the Chronic Functional Constipation Treatment.

Inclusion criteria: * Chronic functional constipation present, diagnosed by Rome III criteria. * Present in most evacuations intestinal feces classified as Type 1 or 2 by the classification of Bristol. * Women sexually active and reproductive age, using more than three months effective contraceptive method. * Concordance, level of education and consciousness enough to cooperate with the completion of all study procedures. * No contraindication to the use of medication in the study. * Availability to attend all the visits of the study evaluation. Exclusion criteria: * History or presence of neurological disorders and / or metabolism. * Persons with constipation caused by previous surgery. * Presence of obstructive lesions in the gastrointestinal tract, including colorectal cancer. * Irritable bowel syndrome or inflammatory bowel disease. * Multiple Sclerosis * Parkinson's disease * Other abnormalities such as Hirschsprung's disease and Defecation Dissinrgica. * Heart disease and / or hypertension. * Continuous use of medication such as analgesics, anti-cholinergic (anti-histamines, antispasmodics, antidepressants, anti-psychotics), supplements with iron or aluminum, Opiates, Anti-hypertensive, CALCIUM CHANNEL BLOCKERS Preganglionic and blockers. * Use of any other except the laxative rescue medication during the study. * Subjects who do not confirm the diagnosis of ICFC during Phase I of the study. * Pregnant or breast-feeding period. * Laboratory tests outside the normal range, or the result is assessed as clinically significant by the Investigator. * Body Mass Index (BMI) over 30. * Participation in another clinical study within 30 days. * Do not fill the correct Diary * Any condition that in view of the researcher impossible the Subject to participate in the study. The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.