Clinical Research Directory

Inclusion Criteria: * Age 18 to 75 years. * Scheduled for elective outpatient colonoscopy for a screening, surveillance, or diagnostic indication. * Has previously undergone colonoscopy using a conventional bowel preparation solution, without requiring repeat colonoscopy because of poor bowel preparation. * Able to provide informed consent. * Willing and able to comply with study procedures, including timed dosing, required clear-fluid intake, and capsule preparation procedures for participants enrolled in Part III. * Able to swallow solids, liquids, and pills without difficulty. Exclusion Criteria: * Higher risk for clinically significant fluid or electrolyte shifts, including chronic renal impairment, severely reduced renal function, congestive cardiac failure, unstable cardiovascular disease, or any other condition in which large-volume fluid intake or rapid catharsis may be unsafe. * Baseline clinically significant electrolyte abnormalities. * Diabetes mellitus, gastroparesis, gastric retention, intestinal dysmotility, or any other condition that may impair gastric emptying, gastrointestinal transit, mixing, dissolution, or passage of the bowel preparation. * Current use of medications that may impair gastrointestinal motility or safe bowel preparation completion, including opioid medications, anticholinergic medications, or glucagon-like peptide-1 receptor agonists. * Known or suspected gastrointestinal obstruction, bowel obstruction, ileus, bowel perforation, gastrointestinal perforation, or any condition associated with increased risk of obstruction or perforation. * Acute abdominal or gastrointestinal condition in which bowel preparation may be unsafe, including acute surgical abdomen, acute appendicitis, gastroenteritis, diverticulitis, toxic colitis, toxic megacolon, severe colitis requiring urgent care, or another acute inflammatory, infectious, or structural gastrointestinal condition judged by the investigator to make participation unsafe. * Known gastrointestinal ulceration or clinically significant active gastrointestinal bleeding, including unexplained rectal bleeding. * Active nausea or vomiting at screening or before bowel preparation administration that, in the opinion of the investigator, would interfere with safe ingestion of the assigned capsule-based bowel preparation regimen. * Emergency colonoscopy, including colonoscopy for lower gastrointestinal bleeding or any clinical condition requiring urgent endoscopic evaluation that would not allow adherence to the study bowel preparation protocol. * Known hypersensitivity, allergy, or intolerance to Bi-PegLyte, Pico-Salax, bisacodyl, polyethylene glycol, sodium picosulfate, magnesium oxide, citric acid, electrolytes contained in the formulations, HPMC/hypromellose capsules, or any ingredient in the formulation or product container. * Pregnancy or known or suspected pregnancy at screening or before bowel preparation administration. * Capsule-specific feasibility or safety concern, including dysphagia, esophageal dysmotility, achalasia, esophageal stricture, high risk of aspiration, anatomical abnormality affecting swallowing, or any condition in which swallowing a large number of capsules is considered unsafe. * Practical or adherence-related concern, including inability to follow timed dosing instructions, inability to comply with the required clear-fluid intake, lack of reliable contact, or anticipated nonadherence to study procedures. * For Part III only: inability or unwillingness to self-prepare capsules using study-provided materials and instructions; inadequate manual dexterity or vision to prepare capsules safely and accurately; inability to complete the teach-back procedure, if required; or unwillingness to follow the standardized home preparation workflow, including use only of study-supplied materials, preparation within the defined time window, and storage as instructed. * Any contraindication listed in the product monograph for Bi-PegLyte or Pico-Salax.