The most effective starting point for constipation is increasing your fiber intake, either through food or a fiber supplement like psyllium. If that doesn’t work within a few days, over-the-counter osmotic laxatives are the next step. Beyond those two options, there’s a full toolkit of remedies ranging from dietary changes to stimulant laxatives, each with different speeds and strengths.
Fiber: The First Thing to Try
Fiber is the foundation of constipation treatment because it directly changes the consistency and size of your stool. Soluble fiber draws water into your stool, making it softer and bulkier. That extra bulk triggers your colon to contract and push things along. You’ll find soluble fiber in oatmeal, whole grains, apples, bananas, and cooked vegetables. Insoluble fiber, found in leafy greens, nuts, popcorn, fruit skins, and dried fruit, adds roughage that helps stool move through your digestive tract.
Most people don’t eat enough fiber. Current dietary guidelines recommend 14 grams for every 1,000 calories you eat daily. In practical terms, that means women should aim for 25 to 30 grams per day and men should target 30 to 38 grams. If you’re currently eating far less than that, increase gradually over a week or two. Adding too much fiber at once can cause bloating and gas. Drink extra water as you increase your intake, since fiber needs fluid to do its job.
Foods That Work Like Laxatives
Prunes deserve their reputation. They contain fiber, but they also have a naturally occurring sugar alcohol called sorbitol that draws water into the intestines. This dual effect makes them more powerful than most high-fiber foods on their own. If you don’t like prunes, apple juice contains sorbitol too, though in smaller amounts.
Other foods worth adding to your routine: kiwifruit, pears, figs, and flaxseed. A bowl of oatmeal with sliced pear and ground flaxseed in the morning can make a real difference over a few days. These aren’t dramatic fixes, but for mild or occasional constipation, dietary changes alone often resolve the problem without any medication.
Bulk-Forming Laxatives
If you can’t get enough fiber through food, bulk-forming laxatives are the supplement version of the same strategy. Psyllium (sold as Metamucil), methylcellulose (Citrucel), and polycarbophil (FiberCon) all work by adding soluble fiber to your stool. That fiber absorbs water, making stool bigger and softer, which signals your colon to start moving.
These are gentle, safe for long-term use, and generally the first option doctors recommend. The tradeoff is speed: they take anywhere from 12 hours to three days to produce a bowel movement. They’re better as a daily habit than a quick fix. Take them with a full glass of water, and keep your fluid intake up throughout the day.
Osmotic Laxatives
Osmotic laxatives work by pulling water into your intestines, which softens stool and increases the urge to go. Polyethylene glycol (MiraLAX) is the most commonly used option and is available over the counter. Magnesium citrate is another choice in this category, and it tends to work faster and more forcefully.
Polyethylene glycol is a good middle-ground option when fiber alone isn’t enough. You dissolve it in a drink once daily, and most people see results within one to three days. Magnesium citrate works more quickly but can cause cramping, so it’s better suited for short-term use. If you have kidney problems, check with your doctor before using magnesium-based products, since your kidneys need to clear the excess magnesium from your body.
Stimulant Laxatives
Stimulant laxatives like senna (Senokot) and bisacodyl (Dulcolax) take a more aggressive approach. Instead of just softening stool, they increase the muscular activity of your intestines, essentially forcing contractions that push stool through. They typically produce a bowel movement within 6 to 12 hours, which is why many people take them at bedtime for morning relief.
These work well for short-term relief, but they come with important limits. Senna should not be used for more than one week without medical guidance. Frequent or prolonged use can make your bowels dependent on the stimulation, reducing their ability to function normally on their own. Older adults in particular should avoid long-term use, as other options are safer for them. Think of stimulant laxatives as a tool for occasional backup, not a daily routine.
Stool Softeners: Less Effective Than You’d Think
Stool softeners containing docusate sodium (Colace) are one of the most widely recommended constipation remedies, but the evidence behind them is surprisingly weak. A comprehensive review of seven randomized, placebo-controlled studies found that none of them showed a significant difference between docusate and a placebo for actually softening stool.
When researchers directly compared docusate to psyllium in a study of 170 people with chronic constipation, the results were stark. Docusate had no measurable effect on stool water content over two weeks of use, with stool remaining in the “hard” category throughout. Psyllium, by contrast, increased stool water content to normal levels within three days and maintained that improvement for the full study period. If you’re choosing between a stool softener and a fiber supplement, the fiber supplement is the better bet.
How to Choose the Right Option
Your choice depends on how urgent the problem is and how often it happens.
- Occasional, mild constipation: Start with more fiber-rich foods, extra water, and physical activity. Prunes or prune juice can speed things along.
- Recurring constipation: A daily bulk-forming laxative like psyllium gives you a steady baseline. Pair it with dietary changes for the best results.
- Moderate constipation not responding to fiber: Add an osmotic laxative like polyethylene glycol. It’s safe for daily use over several weeks.
- Acute, uncomfortable constipation: A stimulant laxative will produce the fastest results, but keep it to occasional use only.
Physical activity also matters more than people realize. Walking, even for 15 to 20 minutes, stimulates the natural contractions of your colon. Staying well-hydrated is equally important, since every type of laxative works better when there’s enough fluid in your system.
Signs That Need Medical Attention
Most constipation resolves with the approaches above, but certain symptoms signal something more serious. Blood in your stool or on the toilet paper, unexplained weight loss, or constipation lasting longer than three weeks all warrant a call to your doctor. A sudden change in your normal bowel pattern is also worth investigating, especially if you’re over 50. These symptoms don’t automatically mean something dangerous, but they need to be evaluated rather than treated with over-the-counter remedies alone.