Can Celexa Make You Tired? | What Sleepiness Often Means

Yes, citalopram can cause drowsiness or fatigue, most often in the first days or after a dose change.

Celexa can leave some people feeling sleepy, slowed down, or worn out. That doesn’t happen to everyone, and it doesn’t always last. For many people, the draggy feeling shows up early, then eases as the body adjusts. For others, tiredness sticks around long enough to need a plan.

If you’re asking this because you just started the medicine, there’s a decent chance the sleepiness is from Celexa itself. If you’ve been on it for a while, the picture gets trickier. Low mood can drain energy. Poor sleep can do the same. So can other medicines, alcohol, or a dose that just doesn’t sit well with you.

The useful question isn’t only “Can it happen?” It’s “What kind of tired is this, when does it show up, and what should I do next?” That’s where the details matter.

Can Celexa Make You Tired? What Usually Happens In The First Weeks

Celexa is the brand name for citalopram, an SSRI antidepressant. Like other SSRIs, it can cause sleepiness in some people and insomnia in others. That split is why one person feels foggy while another feels wired.

Early side effects tend to show up in the first days or first couple of weeks. A dose increase can stir the same thing up again. The feeling is often described as:

• Heavier eyelids during the day
• Low drive to get moving in the morning
• Mental fog or slower thinking
• Needing naps when that’s not your norm
• A “drained” feeling that starts after the dose

The official drug information backs that up. The MedlinePlus citalopram drug page says the medicine may make you drowsy. The current FDA label also lists fatigue and somnolence among reported side effects.

That said, tiredness from Celexa is often mild. Many people can still work, drive later in the day, and function normally once the first adjustment window passes. If the fatigue is heavy enough to affect safety, job performance, or basic daily tasks, that’s a different story.

What Celexa Tiredness Can Feel Like

“Tired” is a broad word. It helps to sort the feeling into buckets, because each one points to a different next step.

Sleepiness

This is the classic drowsy feeling. You could fall asleep on the couch, your eyelids feel heavy, and caffeine barely dents it.

Fatigue

This feels more like low fuel than sleep. Your body feels flat, chores feel bigger than they should, and your pace drops.

Brain Fog

You’re awake, but not sharp. Reading takes longer. Small tasks feel sticky. You may call it tired because it lands the same way in real life.

Flattening From Low Mood

Depression itself can sap energy, motivation, and focus. If you were exhausted before starting Celexa, the medicine may not be the whole reason you still feel wiped out.

That’s why timing matters. If the tiredness started right after your first dose, or right after a dose jump, the medicine moves up the list. If it’s been there all along, the cause may be mixed.

When Daytime Fatigue Is More Likely

Some patterns make sleepiness more likely. None of these guarantee it. They just make the side effect more plausible.

• You take the dose in the morning and feel the slump a few hours later
• You recently started Celexa or went up in dose
• You also take medicines that can make you sleepy
• You’re not sleeping well at night
• You drink alcohol, which can worsen drowsiness
• You already deal with low energy from depression or anxiety burnout

The NHS side effects page for citalopram notes that common side effects often settle as your body gets used to the medicine. That fits the usual pattern many people report: rough start, then a smoother middle.

Situation	What It Often Feels Like	What To Watch
First few days on Celexa	Sleepy, foggy, low energy	Whether it eases after a week or two
After a dose increase	Old side effects return or feel stronger	Whether the tiredness tracks the new dose
Morning dosing	Midday slump or urge to nap	Whether timing lines up with the dose
Poor sleep at night	Heavy daytime fatigue	Whether the medicine is causing insomnia instead
Alcohol use	Extra drowsy or slowed down	Worse coordination, worse judgment
Other sedating medicines	Stacked sleepiness	Antihistamines, sleep aids, pain medicines
Depression itself	Drain, low drive, long recovery after tasks	Whether energy was low before treatment
Not enough food or fluids	Weak, shaky, tired	Whether symptoms improve after eating and drinking

What You Can Do If Celexa Makes You Sleepy

You don’t need to tough it out in silence. There are a few practical moves that often help, and they’re simple enough to try while you track what’s happening.

Shift The Dose Time

If your prescriber says it’s fine, taking Celexa in the evening instead of the morning can help some people. This works best when the sleepy spell clearly follows the dose.

Track The Pattern For A Few Days

Write down the dose time, how many hours you slept, any alcohol, any other medicines, and when the fatigue hits. A short pattern log can make the next appointment much more useful.

Check Your Other Medicines

Allergy pills, sleep aids, anti-nausea medicines, muscle relaxers, and some pain medicines can stack on top of Celexa. Even an over-the-counter antihistamine can turn mild tiredness into a long, flat day.

Give It A Little Time If The Fatigue Is Mild

If you just started and the tiredness is annoying but manageable, it may fade as your body settles in. That window is often measured in days to a few weeks, not months.

Call Your Prescriber If It’s Hitting Hard

If you can’t stay awake at work, can’t drive safely, or feel so slowed down that normal life is getting clipped, a dose change or a different medicine may fit better.

The FDA prescribing information for Celexa lays out side effects, dosing limits, and safety warnings that matter when tiredness is mixed with other symptoms.

Celexa Tiredness Vs Depression Fatigue

This is the part that trips people up. Celexa can make you tired, yet untreated depression can do the same thing. You can’t always tell the difference on day one, but the pattern often gives it away.

Medicine-related tiredness tends to start soon after the dose begins or changes. Depression fatigue is often broader. It may have been there for weeks, long before the first tablet, and may come with low drive, heavy mood, poor focus, and sleep that doesn’t refresh you.

If your mood is lifting while the sleepiness stays stuck, that points more toward the medicine. If your mood is still low and your body feels like wet cement all day, the depression may still be doing a lot of the work.

Clue	More In Line With Celexa	More In Line With Depression
Timing	Starts after starting or raising the dose	Started before treatment
Daily pattern	Worse after taking the pill	Present most of the day, less tied to dose time
Course over days	May ease as the body adjusts	May lift only as depression lifts
Associated signs	Drowsy, foggy, slowed down	Low drive, hopelessness, poor interest, heavy mood

When Tiredness Needs Fast Medical Advice

Some symptoms should not be brushed off as “just a side effect.” Get urgent help if the fatigue comes with fainting, chest pounding, severe dizziness, confusion, agitation, fever, muscle stiffness, or a sudden change in behavior.

Also act fast if you feel a sharp swing into self-harm thoughts or feel unable to stay safe. Antidepressants carry a warning about suicidal thoughts and behaviors in some younger patients, mainly early in treatment and after dose changes.

If the tiredness is paired with rash, swelling, trouble breathing, or repeated vomiting, treat that as urgent too.

What Most People Need To Know

Can Celexa make you tired? Yes. It can cause drowsiness, fatigue, or brain fog, especially early on or after a dose increase. In many cases, that eases. In some cases, it’s a sign the timing, dose, or medicine itself isn’t a good fit.

The best next move is to match the feeling to the pattern. Note when it started, whether it follows the dose, what else you take, and whether your mood is lifting or still low. That turns a vague complaint into something your prescriber can act on.

If you feel mildly sleepy, a timing change and a short watch-and-track period may be enough. If you feel unsafe, wiped out all day, or suddenly worse in other ways, get medical advice soon.