You haven't gone in four days. The prunes aren't working. The coffee isn't working either. You're eating less than you used to, you're drinking what feels like enough water, and your gut has slowed to a stop. If you're a few weeks or months into Ozempic or another GLP-1, this is one of the most common complaints in the literature, and it has a specific mechanism behind it. So the Ozempic constipation remedies that actually work tend to look different from the ones you'd reach for with everyday constipation.
In the STEP 1 trial of semaglutide, 23.4% of patients reported constipation, compared to 9.5% on placebo. Roughly one in four users, in other words. Most cases are mild to moderate and resolve as the body adjusts, but they can flare again with each dose increase, and a small share of people don't get full relief without changing their fiber and fluid routine.
Why Ozempic causes constipation
Two mechanisms stack on top of each other.
The first is mechanical. Ozempic and other GLP-1 medications slow gastric emptying, which is part of how they make you feel full. The same slowing extends through the rest of the digestive tract. Food spends longer in each segment. Water keeps getting reabsorbed from the stool the longer it sits in the colon, which makes everything harder, drier, and more difficult to pass.
The second is dietary. When your appetite drops, you eat less of everything, including the fiber and fluid your gut depends on. Most American adults already fall short of the 25 to 38 grams of daily fiber the dietary guidelines recommend. Cut food intake by 20 or 30 percent and the gap opens further. Less fiber means less bulk, less fermentable substrate for your gut bacteria, and less of the natural signal that tells your colon to keep moving.
A third factor compounds the first two: GLP-1 receptor agonists also suppress thirst, partly through a mechanism that appears independent of their effect on appetite. So you're drinking less than your old normal, on top of eating less. Stool dries out from both directions.
The remedies that work, in order
These are the changes worth making before considering laxatives, ranked by what tends to do the most for the smallest effort.
Drink more water than feels necessary. Aim for 64 to 96 ounces a day on a GLP-1, and don't wait for thirst. Plain water counts. Water with electrolytes counts. Coffee and tea count, mostly. The clearest sign you're getting enough is light yellow urine. Dark concentrated mornings mean you started the day in deficit.
Add soluble fiber, gradually. This is the single most consequential change for most people. Soluble fibers absorb water in the colon, soften stool, and feed the gut bacteria that produce the short-chain fatty acids that signal regularity. We get into the specific fibers below. Start with 5 grams of added fiber per day and build to 10 to 15 grams over a week or two. Adding too much too fast can produce gas and cramping.
Move daily. Walking after meals helps gastric emptying. Twenty minutes is plenty. The effect is small per session but compounds over the week.
Consider a probiotic. Specific strains have evidence in adult constipation, particularly Bifidobacterium lactis. A probiotic alone won't move things; a probiotic alongside the fiber and fluid changes above is where the literature shows benefit. The deeper case is in The Best GLP-1 Probiotic for Ozempic and Wegovy Users.
Reserve stimulant laxatives for occasional use. Senna, bisacodyl, and similar stimulant laxatives can help in a pinch but become less effective with regular use, and they don't address the underlying mechanism. If you're reaching for one more than once a week, the fiber and fluid changes above are the longer-term answer.
Magnesium can help. Magnesium citrate or magnesium glycinate at 200 to 400 mg in the evening softens stool and supports muscle relaxation. It's the gentlest of the laxative-adjacent options and has the side benefit of replenishing a mineral most GLP-1 users are running short on anyway.
The best fiber for Ozempic-related constipation
Not all fiber is equal. The fibers with the strongest evidence for slow-transit constipation are soluble fibers that absorb water and ferment slowly. Three specifically:
Psyllium husk is the most studied for adult constipation. Three to five grams a day adds bulk and softens stool reliably. Drink it in 8 to 12 ounces of water; psyllium without enough fluid can make things worse, not better.
Inulin is a prebiotic fiber that ferments more readily than psyllium, which means it feeds gut bacteria specifically. Some people get gas at higher doses (above 10 grams a day), so titrate up gradually.
Partially hydrolyzed guar gum (PHGG) has gentler fermentation than inulin, less gas, and good evidence for stool consistency. It's the soluble fiber most often included in formulations designed for sensitive stomachs.
Apple pectin is a softer soluble fiber often paired with psyllium for blends. It draws water into the stool similarly to psyllium with less of the gritty texture some people find off-putting.
A blend that combines two or three of these (psyllium, inulin or PHGG, and a probiotic) is the most evidence-aligned form of fiber for GLP-1 constipation. It's also why fiber for GLP-1 constipation tends to work better in powder form than in chewable gummies, which usually contain too little active fiber per serving to move the needle.
What to skip: insoluble bran-heavy fibers (raw wheat bran, large doses of cellulose), which can worsen bloating and cramping when transit is already slow. Save those for everyday constipation, not the Ozempic kind.
When to call your prescriber
Call your prescriber if you've gone more than five days without a bowel movement, if you're vomiting and unable to keep fluids down, if you have severe abdominal pain, or if a previously manageable case is escalating. Constipation can occasionally be a sign of something more serious like an obstruction, particularly in the first weeks of treatment or after a dose increase. Your prescriber can adjust your dose, slow your titration, or rule out a complication.
If you're experiencing persistent or severe side effects from your GLP-1 medication, contact your prescriber.
Where NutriQuest fits in
NutriQuest's Fiber and Hydration Supplement was built around exactly this combination. Each scoop delivers a prebiotic fiber blend, a probiotic strain studied for digestive support, electrolytes (sodium, potassium, magnesium), ginger for stomach comfort, and B vitamins, in a single zero-sugar serving mixed with 10 to 16 ounces of water. The fluid intake, the soluble fiber, the probiotic, and the magnesium all show up in the same scoop, which is the smallest reasonable intervention for someone trying to address Ozempic constipation without managing four bottles.
It's nutritional support, not a treatment for any condition. If your constipation is persistent or severe, your prescriber is the right next call.
These statements have not been evaluated by the FDA. NutriQuest is a nutritional supplement, not a treatment for any condition. Talk to your doctor before adding supplements to your GLP-1 routine.