Study Comparing PEG 3350 Laxative to Placebo in the Treatment of Occasional Constipation (Study CL2007-12)(P08216)

Inclusion Criteria: * Subjects (or parents/guardians of minors) must demonstrate their willingness to participate (or to have their children/wards participate) in the study and comply with its procedures by signing a written informed consent. Minor subjects must provide written assent. * Subjects must be 17 years of age or older. * Subjects must present with a current diagnosis of untreated constipation for 7 days or less based on having signs/symptoms of straining and hard or lumpy stools OR the inability to have a BM within 48 hours prior to randomization into the trial. * Subjects must be OTC laxative users for the treatment of occasional constipation (defined as using a nonprescription laxative to treat at least 3 episodes of constipation within the last 12 months prior to randomization). * Subjects must be willing to use study drug for up to 7 days as directed, and must agree to record bowel movement (frequency, consistency, etc.) accurately and consistently in a daily diary, and make two clinic visits. * Subjects must be otherwise in good health, as determined by physical exam and medical history. * Subjects must agree not to use any other products to treat their constipation during the course of the study. * Subjects must agree not to use any medication known to cause constipation during the course of the study. * Subjects must agree to maintain a similar diet from the week prior to randomization through end of study. * Female subjects must be either surgically steril…