The recommended Dulcolax laxative dosage for adults is one or two tablets at night. Dulcolax also recommends taking one to two tablets 30 to 60 minutes prior to bedtime so that the laxatives can work overnight.
Dulcolax recommends that first-time users of Dulcolax laxatives take one to two tablets in a single dose per day. Over time, the dosage may be increased to two to three tablets per day. According to Dulcolax, the ideal time to take their laxative tablets is just before bedtime, as this will produce a bowel movement in the morning. Dulcolax tablets should not be taken with milk or dairy products.