Does Kratom Cause Constipation?

What Do Government and Research Sources Say?

The DEA’s Kratom Drug Fact Sheet lists constipation among the possible physical effects of kratom consumption. Nausea, itching, sweating, dry mouth, increased urination and loss of appetite sit on the same list. These are effects some users report. They are not outcomes every kratom user should expect.

The National Institute on Drug Abuse calls constipation one of the most commonly reported mild effects, alongside nausea, dizziness and drowsiness. Again, not universal. NIDA also notes that more serious gut problems, including vomiting, have appeared in clinical case reports. It describes those as rare.

A 2022 review in Frontiers in Pharmacology names constipation among the most common adverse effects users report. Nausea, vomiting and other stomach upset sit alongside it. In the dataset that review draws on, roughly 20% of 3,024 respondents reported a side effect, and reports rose with higher and more frequent use.

Why Does Kratom Cause Constipation?

Kratom’s alkaloids interact with the same receptor systems that opioids act on. Slowed gut movement is a well-documented effect of drugs acting on those receptors. Kratom side effects covers that mechanism in full.

What it means here is specific. Slower transit gives the colon more time to do its normal job, which is pulling water out of stool as it passes through. More time means drier stool. That is also why dehydration compounds this one, and why the two often show up together. Kratom dehydration covers fluid loss directly.

How Common Is It?

Nobody has measured it. There is no figure for how many kratom users get constipated, because no study has counted.

What exists is a 2020 survey of 2,798 self-reported kratom users, run by researchers at Johns Hopkins University School of Medicine and the National Institute on Drug Abuse. About a third of respondents reported mild side effects, and most cleared within a day. Under 2% reported an effect serious enough to seek medical care for. Johns Hopkins Medicine’s summary names constipation, upset stomach and lethargy as examples of what the mild effects looked like. Examples, not a separately measured rate.

Read that survey with its limits in view. Everyone in it chose to answer a questionnaire about a product they already use. People who had a bad time and stopped are less likely to be in the sample.

Outside the research, this is one of the more common questions we hear from customers. It usually comes from people who noticed it after increasing how often they take kratom, and want to know whether that’s normal. It’s a reported pattern, not a sign something unusual is happening.

How Long Does It Last?

For most people in that survey, mild side effects cleared within a day. That is the whole of what has been published, and it covers every effect, not constipation on its own. Nobody has tracked how long kratom constipation lasts.

What our customers describe is that it tracks with the pattern rather than the day. It shows up when use becomes consistent, and it fades when the pattern changes. That is one store’s experience, not a study.

Does Product Format Change the Risk?

Kratom is sold as powder, capsules and extract. Those formats are not the same in alkaloid content. Extract is concentrated from leaf material rather than milled from it. So a small amount of extract can carry far more alkaloid content than a much larger amount of powder. Kratom extract vs powder covers how the two are made and how they differ.

The receptor interaction above is what drives this side effect. Extracts carry more alkaloid content per serving. It is fair to expect the risk rises with it. That’s one reason we don’t recommend extract products to people new to kratom.

What Can Help?

General digestive care is the same here as anywhere. Drink enough water. Get enough fiber. Get regular exercise. None of that is specific to kratom.

Specific to kratom, we suggest drinking more water on days when use runs higher than usual. We also don’t recommend daily use as a pattern. Consistent, ongoing use is where this side effect tends to show up and stay. If use has become regular, How to stop taking kratom covers breaks, reduced-use days and gradual step-down approaches.

We don’t sell anything that fixes this, and we’re not going to point you at one. Nothing on our shelf is offered as an answer to a side effect.

Writing down what actually happens is more useful than guessing. Printable kratom tracker sheets and journals are in the Responsible Use Toolkit.

None of this is medical advice. None of it takes the place of a physician if constipation is lasting, severe, or unusual for you.

When Should You See a Physician?

See a physician if constipation lasts more than a few days, comes with real belly discomfort, or is a new pattern you can’t explain. The same goes if you notice blood. The same goes for any gut symptom bad enough to get in the way of daily life.

This page is educational and is not medical advice. A physician is the right person to judge a specific case, not a retailer.

Does This Mean You Should Stop Taking Kratom?

That is not a call this page is going to make for you. The rest of our Responsible Kratom Use pillar covers who should avoid kratom altogether, and what to weigh if you’re thinking about cutting back. If a physician tells you to stop, that instruction comes from them, not from a website.