After taking the laxative Dulcolax, it can take between 6 to 12 hours for it to work, states WebMD. Dulcolax is an over-the-counter medication used mainly used to treat constipation. It is a stimulant laxative that contains the ingredient bisacodyl.
Another use of this product may be for clearing out the bowels before a surgery or a radiological exam. However, this laxative is for short-term use. Using laxatives for extended lengths of time can lead to health problems like low potassium levels in the body and an imbalance in electrolytes, according to NetDoctor.
In certain people, this type of laxative can cause stomach cramps and diarrhea, relates WebMD. Furthermore, if other side effects occur, such as dizziness, changes in mental state, or a heartbeat that is not normal, then a person should contact his doctor.