Take Dulcolax stool softener, in tablet or liquid form, by mouth before going to bed, states WebMD. Follow package instructions, and measure carefully to ensure proper dosage.
When using the liquid form of Dulcolax, mix the product in fruit juice or milk to mask the bitter taste and reduce throat irritation, recommends WebMD. Take Dulcolax tablets with a full glass of water or juice. Unless directed by a doctor, do not use the product for more than one week.
Dulcolax contains the stool softener docusate, which increases the amount of water the stool absorbs, making it softer and easier to pass, notes WebMD. Doctors often recommend Dulcolax to patients recovering from a heart attack or surgery, as they should avoid straining to have a bowel movement.