Why can a psychiatric medication make you feel restless?

It’s 9:38 p.m. You’ve moved from the couch to the kitchen, from the kitchen to the hallway, and from the hallway back to the couch, which has become less a seat than a brief layover. Your legs feel recruited for a job you didn’t apply for. When you try to stay still, the discomfort climbs.

That kind of restlessness can have several causes. One is akathisia, a medication-related movement problem that combines an inner sense of unease with an urge to move. You might pace, shift your weight, swing a foot, cross and uncross your legs, or feel as if sitting still requires unreasonable effort. It can be frightening, and it’s often mistaken for anxiety or worsening illness.

Restlessness has a texture worth describing

Ordinary restlessness is usually flexible. You’re bored in a meeting, you stand up, and the feeling loosens. Akathisia can be more relentless. Movement may bring temporary relief, but the urge returns when you stop. Some people describe tension deep in the legs. Others feel it through the whole body, as if their internal waiting room has removed every chair.

Clinicians look for both the subjective experience and observable movement. That distinction matters because a person may feel unbearable inner restlessness without dramatic pacing, while another person’s tapping may be a longstanding habit. A brief office visit can miss it if nobody asks what being still feels like.

Akathisia is most closely associated with antipsychotic medications, although restlessness can occur with other medicines too. Risk varies across medications and doses, and research on antipsychotics suggests that risk often changes with dose. It may emerge soon after starting treatment or increasing a dose, but timing isn’t perfectly tidy.

I’ll often ask a patient to walk me through the calendar: when the medication started, when the dose changed, when the pacing appeared, and whether movement briefly helps. The calendar doesn’t prove the diagnosis, but it can turn “I feel awful” into information a prescriber can use.

Anxiety is not the only possible explanation

Akathisia can look like anxiety because both may involve tension, poor sleep, and an inability to settle. The difference isn’t something an article can diagnose. Anxiety often travels with worry, fear, or a specific prediction. Akathisia may feel more physical and compelled, although real people don’t divide themselves into such considerate categories.

Other possibilities include agitation from depression or psychosis, a rising manic episode, restless legs syndrome, medication withdrawal, stimulant or caffeine effects, pain, thyroid problems, and other medical or neurologic conditions. Several can happen at once. Assuming every new restless feeling is “just anxiety” can delay the right response. Assuming it’s definitely akathisia can do the same.

Write down what you notice without trying to win the diagnostic spelling bee. Where is the sensation? What happens when you sit? Does walking help? Can you sleep? Did anything change in your medication, supplement, caffeine, nicotine, cannabis, or other substance use? Bring the actual medication list, including nonpsychiatric drugs and recent dose changes.

Ask someone who sees you regularly what they’ve noticed. You may feel the inner urgency while they’ve noticed that dinner now includes 14 trips to the sink. Their observation isn’t a verdict. It’s another camera angle.

Prompt contact is safer than a private medication experiment

If intense restlessness appears after a medication change, contact the prescriber promptly. Describe the timing, severity, sleep effect, and whether you can stay safe. If the office is closed, use its after-hours instructions, an urgent care service, or a pharmacist for guidance appropriate to the situation.

Calling doesn’t mean the medication has failed or that you’ve failed treatment. Side effects aren’t a test of toughness, and you shouldn’t have to guess how much discomfort is “enough” to mention. If you can’t work, sleep, eat, attend class, or sit through a conversation, say so plainly. If the feeling isn’t severe but hasn’t eased, report that too. Your prescriber won’t know the chair has become your sworn enemy unless you tell them.

Do not abruptly stop the medication unless a qualified clinician who knows the situation tells you to. Sudden stopping can cause withdrawal, rebound symptoms, relapse, or other problems, depending on the drug. Do not borrow a beta blocker, add a sedative, or take high-dose vitamin supplements because you found a treatment list online. A medication that helps one cause of restlessness can be unsafe or useless for another.

The American Psychiatric Association guideline lists clinician-directed options for antipsychotic-associated akathisia that may include lowering the dose, switching medication, or adding certain treatments. Systematic reviews also find possible benefit from several add-on medicines, but trials are generally small and confidence varies. That’s precisely why treatment belongs in a personalized conversation, not a kitchen-counter chemistry practical.

Your prescriber may review whether the current medication is still the best fit, check other causes, rate the symptoms over time, and weigh a change against the reason the medication was prescribed. The goal isn’t merely to make you hold still. It’s to reduce distress while protecting the treatment benefit and your safety.

Some restless feelings should not wait for a routine appointment

Akathisia can be profoundly distressing. Research has linked it with treatment discontinuation, and some studies raise concern about suicidal thoughts or behavior, although the relationship is complicated by the underlying illness and other factors. You don’t need to settle that research question before asking for help.

If you have thoughts of suicide, feel unable to keep yourself safe, or are becoming dangerously agitated, call or text 988 in the United States. Call 911 or go to the nearest emergency department for immediate danger. Fever, severe muscle rigidity, confusion, fainting, chest pain, or a sudden severe change in mental state also needs urgent medical assessment.

You don’t need to wait for every symptom to line up neatly. Bodies aren’t famous for completing forms. If you’re unsure whether the situation is urgent, say what’s happening to a qualified clinician and ask what level of care makes sense. That conversation can’t guarantee an instant answer, but it’ll be safer than quietly adding, skipping, or moving doses while you’re distressed.

For a small next step, make a four-line note: medication and dose, date of the last change, what your body is doing, and how much sleep you’re getting. Then send or read that note to the prescriber. You’re not being difficult, and you’re not required to pace politely until the next scheduled visit. A side effect is part of treatment, not an extracurricular activity.

Sources: American Psychiatric Association, Practice Guideline for the Treatment of Patients With Schizophrenia (2020); Pringsheim and colleagues, Canadian Journal of Psychiatry, systematic review and guideline on assessing and treating antipsychotic-induced akathisia (2018); Gerolymos and colleagues, JAMA Network Open, systematic review and network meta-analysis (2024); Furukawa and colleagues, Schizophrenia Bulletin, network meta-analysis (2026).