Are laxatives safe to use long-term? I’m prone to constipation and it’s the only way I get a daily clear-out. Dara, Burton upon Trent People differ in how often they poo. If your transit time (the number of hours food takes to travel through you) is a bit longer, you may only poo once or twice a week. You want a firm, soft poo that slips out easily, not rabbit droppings. Laxatives can make your bowel sluggish, so it’s healthier to switch to a high-fibre diet and drink lots of water. To check your transit time, eat sweetcorn and note when it reappears in your poo. Anything from 12 to 48 hours is normal.