Members Mark ClearLAX relieves occasional constipation (irregularity). It generally produces a bowel movement in 1 to 3 days. Polythylene glycol 3350 increases frequency of bowel movement and softens the stool. While we strive to obtain accurate product information, we cannot guarantee or ensure the accuracy, completeness or timeliness of any product information. Carefully read and follow all package directions. SamsClub.com assumes no liability for inaccuracies or misstatements about products.