Dulcolax Tablets ( 18 years plus) offer relief from constipation by gently stimulating the bowel and returning the body habit to its natural rhythm. Do not use in children under the age of 18 years. Dulcolax Tablets are the gentle but effective remedy for a fast relief of constipation. The active ingredient, Bisacodyl, stimulates the colon which offers you relief between 6 and 12 hours. Dulcolax Tablets specifically dissolve in alkaline environments, which is where the colon can be found. It pr s the perfect relief so you don\'t be uncomfortable all day and night. Drug Safety Update: measures for stimulant laxatives. Stimulant laxatives should only be used if other laxatives (bulk-forming and osmotic) are ineffective. Do not use in children under the age of 18 years. If you are not sure, talk to your pharmacist or doctor before taking this medicine. Approved by Melanie King - Senior Pharmacist on the 22/09/2020. For more information, view our medical team