The recommended dosage for Dulcolax tablets is one to three tablets daily for adults, according to Drugs.com. Patients who take the tablets at bedtime can expect alleviation of constipation within eight to 12 hours. Patients who take the medication during waking hours can expect effect within six hours.
Dulcolax is a laxative that relieves occasional constipation. It stimulates the bowel muscles and facilities a bowel movement, explains Drugs.com. Patients should swallow a tablet whole without chewing and should not take this medication within one hour of consuming antacids or milk products. Side effects of this medication include abdominal discomfort, cramps, nausea, diarrhea, faintness and vomiting.