Flexeril, also known as cyclobenzaprine, is often prescribed for people struggling with muscle spasms, pain from injuries, or recovery after physical strain. It can make day-to-day movement more manageable by relaxing tight muscles and easing discomfort. But like many medications, Flexeril comes with side effects that patients should be aware of. One common question is whether it affects digestion, and specifically, does Flexeril cause constipation? Since constipation is a known issue for some users, it is worth looking at why this happens and what can be done about it.

How Flexeril Works and Why It Affects Digestion

Flexeril is prescribed for muscle spasms, pain relief, and acute musculoskeletal conditions. Because it has anticholinergic effects, meaning it reduces the activity of the parasympathetic nervous system, it can slow gut motility and digestive secretions. The result is that bowel movements become slower, giving the body more time to absorb water from stool. This often leads to stools that are harder and drier, making constipation more likely.

Who Is More at Risk?

Not everyone who takes Flexeril will experience constipation, but some people are more prone than others. The risk tends to be higher in those using larger doses or taking the drug for longer periods of time. People who also use other medications with anticholinergic effects, such as certain antidepressants, may notice a stronger impact. Low fluid intake, poor diet, and lack of physical activity can all make constipation worse, and older adults or individuals with pre-existing digestive issues may also be more vulnerable.

What to Watch For

Signs that Flexeril might be contributing to constipation include having fewer than three bowel movements a week, stools that are dry and hard to pass, and discomfort or straining during bathroom visits. Some people may also notice bloating or abdominal discomfort. When these symptoms appear after starting or increasing a dose of Flexeril, the medication may be the cause.

Occasional constipation may not be a cause for alarm, but if symptoms become severe or persistent, it is important to contact a doctor. Medical help is especially important if constipation is accompanied by pain, bleeding, or sudden changes in bowel habits. Your physician can determine whether the problem is due to Flexeril or another underlying cause and decide if treatment adjustments are needed.

Managing Constipation While Taking Flexeril

Fortunately, there are ways to reduce or prevent constipation linked to Flexeril. Drinking enough water each day, eating a diet rich in fiber, and keeping physically active can help keep the digestive system moving. Some people benefit from probiotics or fiber supplements to support gut health. In cases where constipation persists, a doctor may suggest stool softeners or mild laxatives. Adjusting the dose of the medication under medical guidance, or switching to a different medication if necessary, can also make a difference.

Bottom Line

Can flexeril cause constipation? The answer is yes, as its anticholinergic properties slow digestion, which makes bowel movements more difficult. While not everyone will experience this side effect, it is common enough to watch for. With attention to hydration, diet, and activity, many people can reduce discomfort. If symptoms persist, medical support ensures both safe and effective management while continuing treatment for muscle pain and spasms.