Can Citalopram Cause Constipation? | What To Expect

Yes, this antidepressant can slow bowel movement and lead to constipation, especially during the first weeks of treatment.

Citalopram is a widely used SSRI for depression and anxiety, and many people take it for months or years. Alongside mood changes, the drug can also change how the gut works. One of the most common gut complaints is feeling backed up, needing to strain, or passing hard stools.

Constipation on this medicine is more than a minor annoyance for some people. It can cause bloating, discomfort, and worry about whether the dose is right. The good news is that this side effect is usually manageable with simple steps, and in many cases it eases as the body adjusts.

This guide walks through why constipation can appear on citalopram, how often it shows up, warning signs to watch for, and practical ways to get your bowels moving again without stopping treatment on your own.

Citalopram And Constipation: What Actually Happens In Your Gut

Most of the serotonin in the body lives in the digestive tract, not the brain. SSRIs such as citalopram work by blocking serotonin reuptake, which changes signalling along nerves that control gut movement. That same action that lifts mood can slow or speed bowel transit in different people.

Drug information sheets from large references such as the NHS side effects page list constipation as a common reaction. Several major databases describe constipation in around 1% to 10% of people who take citalopram, alongside nausea and diarrhoea as other gut changes.

Why does one person get loose stools while another feels blocked? Part of the answer lies in baseline bowel habits, diet, fluid intake, and other medicines. Someone who already has slow bowels, low fibre intake, or uses other constipating drugs such as some painkillers is more likely to feel worse once an SSRI is added.

The dose can also play a role. Higher doses mean more serotonin changes throughout the body, which can affect the muscle contractions that push stool along. For some, that leads to cramping and more trips to the toilet; for others, the waves of movement slow down instead.

How Common Is Constipation On Citalopram?

Large reference sites group side effects by how often they appear in studies and post marketing reports. In these summaries, constipation usually falls into the “common” band, meaning it affects a small but noticeable share of users. Nausea and dry mouth often rank higher, but constipation still appears enough that prescribers mention it during counselling.

Numbers vary between sources, yet a rough pattern repeats. Nausea may show up in over 20% of users, dry mouth in close to that range, while constipation tends to sit in the single digits according to data gathered by the Drugs.com database. That still translates to many people once you realise how widely this SSRI is prescribed.

Most people who feel backed up report that symptoms start in the first few weeks after the dose is started or raised. Some notice that bowel habits settle over time without any special changes. Others keep struggling and need a concrete plan to keep things moving.

Factor	How It Affects Constipation	What You Can Do
Dose Of Citalopram	Higher doses may slow gut transit in some people.	Ask your prescriber whether a lower dose could still work for your mood.
Time On Treatment	Symptoms often appear early and may improve with time.	Track changes for a few weeks before deciding on big treatment shifts.
Baseline Bowel Habits	People with slow bowels already are more likely to feel worse.	Share your usual pattern with your clinician from the start.
Diet And Fibre Intake	Low fibre diets make stools harder and drier.	Add fruit, vegetables, pulses, and whole grains step by step.
Fluid Intake	Not drinking enough makes stool firm and hard to pass.	Spread water or other low sugar drinks across the day.
Activity Level	Sitting all day slows bowel movement.	Short walks and gentle movement can help the gut contract.
Other Medicines	Drugs such as opioids or iron tablets can add to constipation.	Share a full medication list so your team can spot combinations.

Symptoms That Suggest Constipation From Citalopram

Constipation does not look the same for everyone. Some people pass stool less often. Others still go most days but feel that nothing comes easily. The shape and feel of stool can tell you a lot about what is going on.

Common features linked to this side effect include hard lumpy stool, feeling that the bowel does not empty, straining, or needing longer on the toilet. Bloating and gas are frequent as stool sits in the colon for longer and ferments.

Keep an eye out for patterns. If you started citalopram at a set date and noticed changes in the next week or two, the link is stronger. The timing still does not prove cause, yet it gives helpful context for your prescriber when you talk about options.

Who Seems More At Risk?

Some groups run into constipation more often on this medicine. Older adults, people who already live with long term constipation, and anyone who uses medicines that slow the gut are at higher risk. People who eat little fibre or who drink little fluid through the day fit that group as well.

People with conditions such as diabetes, thyroid disease, or neurologic disorders often already have slow gut transit. When an SSRI is added, they may move from mild symptoms to more troublesome blockage. That does not mean they cannot ever use citalopram, but bowel changes deserve closer watching.

How Long Does Constipation Last On Citalopram?

For many, constipation peaks in the first few weeks after starting or raising the dose. As the body adapts, bowel habits may drift back toward baseline. This pattern matches reports for other side effects such as nausea, which often fades with time on treatment.

If constipation shows up early, stays for more than a few weeks, or keeps you from taking your medicine as directed, it is time to act. Simple steps at home can help, yet long lasting symptoms should be shared with a health professional rather than ignored.

Practical Ways To Ease Constipation While Staying On Citalopram

Before thinking about stopping antidepressant treatment, most clinicians recommend a set of straightforward changes. These steps do not cure every case, yet they reduce strain for many people and are low risk for most adults.

Day To Day Habits That Help

Food and drink choices shape stool texture and how fast it moves through the colon. A slow shift toward more plant based meals usually helps. Think plenty of vegetables, fruit with skins where you can tolerate it, pulses such as beans and lentils, and whole grain breads or cereals.

Water matters too. A bowel packed with dry stool reacts badly when fibre intake jumps. Aim for regular fluids spread across the day rather than a large amount at once. If you have heart or kidney disease, check fluid targets with your clinician first.

Movement wakes up the gut as well as the rest of the body. Even ten minute walks after meals can help the colon contract and move stool along. Desk breaks, gentle stretching, and choosing stairs over lifts now and then all add up.

Simple Toilet Habits

The way you sit on the toilet and the time you take there can ease or worsen constipation. Many people find it easier to pass stool when they lean forward slightly with feet raised on a small stool, which bends the hips and straightens the rectum.

Responding to the first urge to go rather than holding on also helps. Waiting too long allows the colon to draw more water from stool, which makes it harder and drier. Setting aside unhurried time after breakfast or another regular meal trains the body into a routine.

Over The Counter Options

When food, fluid, and movement are not enough, gentle laxatives can make a big difference. Osmotic products based on macrogol or lactulose draw water into the stool and are often used for drug related constipation. Bulk forming agents such as psyllium add fibre and soften stool, though they need steady fluid intake alongside. Guidance from resources like Patient.info often points to these options as first steps.

Short courses of stimulant laxatives such as senna can help in stubborn cases, but long term daily use should be guided by a healthcare professional. Doses may need adjustment over time, and some laxatives interact with other medicines.

Strategy	Practical Step	Notes
Fibre Boost	Add one extra portion of fruit or vegetables at each meal.	Increase slowly to reduce gas and cramps.
Fluid Plan	Keep a refillable bottle nearby and sip through the day.	Use plain water or low sugar drinks most of the time.
Movement Snacks	Stand, stretch, or walk for a few minutes every hour.	Set a timer if desk work makes hours slip by.
Toilet Position	Use a small footstool and lean forward slightly.	This posture lines up the rectum and eases strain.
Softener Or Osmotic	Use macrogol or similar products as directed on the pack.	Often better for regular use than frequent stimulant pills.
Bulk Forming Fibre	Try psyllium husk with plenty of water.	Stop if bloating or pain become severe.
Short Term Stimulant	Use senna or bisacodyl for a few days only.	Check with a pharmacist if you use other medicines.

When Constipation On Citalopram Needs Urgent Care

Most constipation from antidepressants is uncomfortable but not dangerous. Some warning signs call for prompt medical review. These include severe tummy pain, vomiting, complete lack of gas or stool for several days, or swelling of the abdomen.

Blood in the stool, black tar like stool, or weight loss without trying are other red flags. These features can signal bleeding, blockage, or another condition that needs tests. Major centres such as the Mayo Clinic monograph flag these symptoms as reasons to seek urgent help.

People with a history of bowel obstruction or serious gut disease should treat these symptoms as an emergency. If you feel faint, develop chest pain, or notice new confusion along with bowel symptoms, seek urgent help through local emergency services. These signs can reflect more than a simple side effect.

Talking To Your Prescriber About Constipation

Never stop citalopram suddenly without medical advice, even if constipation feels severe. Sudden withdrawal can bring on flu like symptoms, mood swings, and return of the original condition. A planned change is far safer.

Bring clear notes to your next appointment. Write down when constipation started, how often you pass stool, what it looks like using a stool chart if you have one, and what you have already tried. Share any over the counter products, herbal remedies, or supplements you take, as these can interact with antidepressants or laxatives.

Your clinician may suggest a lower dose, a slower dose increase, or a switch to another antidepressant with a different side effect pattern. In some cases a gastroenterology referral or further tests are helpful to rule out other causes, especially in older adults or people with new bowel symptoms.

Balancing Mood Benefits And Gut Comfort

For many people, the mood gains from citalopram are worth dealing with some digestive discomfort. With the right habits, most cases of constipation can be kept under control. The goal is not flawless bowel habits but a pattern that feels manageable and allows you to keep taking treatment that helps your mental health.

Paying attention early, sharing honest details with your care team, and using food, fluid, movement, and medicines in a thoughtful way all reduce the burden of this side effect. If you feel unsure about any step, reach out to your clinician or pharmacist for tailored advice based on your health history.