A Safety and Efficacy Evaluation of BLI400 Laxative in Constipated Adults

Inclusion Criteria: * Male or female subjects at least 18 years of age * Constipated, defined by the following adapted ROME II definition: A. Fewer than 3 spontaneous defecations per week and at least one of the following symptoms for at least 12 weeks (which need not be consecutive) in the preceding 12 months: 1. Straining during \> 25% of defecations 2. Lumpy or hard stools in \> 25% of defecations 3. Sensation of incomplete evacuation for \> 25% of defecations B. Loose stools are rarely present without the use of laxatives C. There are insufficient criteria for IBS - loose (mushy) or watery stool in the absence of laxative use for more than 25% of bowel movements Criteria A, B and C must be fulfilled for the last 3 months with symptom onset at least 6 months prior to diagnosis. * Otherwise in good health, as determined by physical exam and medical history * If female, and of child-bearing potential, is using an acceptable form of birth control * Negative urine pregnancy test at screening, if applicable * In the Investigator's judgment, subject is mentally competent to provide informed consent to participate in the study Exclusion Criteria: * Subjects with known or suspected ileus, gastrointestinal obstruction, gastric retention, bowel perforation, toxic colitis, toxic megacolon * Subjects who have had major surgery 30 days before Visit 1; appendectomy or cholecystectomy 60 days before Visit 1; abdominal, pelvic, or retroperitoneal surgery 6 months before Visit 1; bariatric surgery or surgery to remove a segment of the GI tract at any time before Visit 1 * Subjects with hypothyroidism that is being treated and for which the dose of thyroid hormone has not been stable for at least 6 weeks at the time of Visit 1 * Subjects taking laxatives, enemas or prokinetic agents that refuse to discontinue these treatments from Visit 1 until after completion of Visit 5 * Subjects who are pregnant or lactating, or intend to become pregnant during the study * Subjects of childbearing potential who refuse a pregnancy test * Subjects who are allergic to any study medication component * Subjects taking narcotic analgesics or other medications known to cause constipation * Subjects with clinically significant cardiac abnormalities identified at the Visit 1 ECG * Subjects who, in the opinion of the Investigator, should not be included in the study for any reason, including inability to follow study procedures * Subjects who have participated in an investigational clinical, surgical, drug, or device study within the past 30 days * Subjects with an active history of drug or alcohol abuse * Subjects have been hospitalized for a psychiatric condition or have made a suicide attempt during the 2 years before Visit 1 * Subjects who withdraw consent at any time prior to completion of Visit 1 procedures * Subjects with known or suspected moderate to severe hepatic insufficiency (Child Pugh Classes B and C)