Restless Legs and Akathisia from Medications: How to Tell Them Apart and What to Do

When you start a new medication-especially an antipsychotic-and suddenly feel like you can’t sit still, it’s easy to blame stress, anxiety, or just being "overactive." But what if that inner urge to move isn’t in your head at all? What if it’s a direct side effect of the drug itself? Two conditions often get mixed up: akathisia and restless legs syndrome (RLS). Both make you feel like you need to move, but they’re not the same. And confusing them can make things worse-sometimes dangerously so.

What Akathisia Really Feels Like

Akathisia isn’t just fidgeting. It’s a deep, painful restlessness that starts in your mind and spills into your body. People describe it as an "aching" need to move, like your bones are crawling under your skin. You don’t want to pace because you’re bored-you have to pace because not moving feels unbearable. One patient described it as, "You ache with restlessness, so you feel you have to walk. And then as soon as you start walking, you need to sit. Back and forth. No relief."

This isn’t something that happens after a long day. It usually shows up within days or weeks of starting or increasing a medication like haloperidol, risperidone, or even metoclopramide (a stomach drug). First-generation antipsychotics carry the highest risk, but even newer ones like quetiapine or olanzapine can trigger it. About 5% to 15% of people on second-generation antipsychotics develop akathisia. For first-gen drugs? It’s 20% to 40%.

The movement is specific: crossing and uncrossing legs, shifting weight constantly, rocking while seated, pacing in place. You can’t relax. Even if you’re sitting, your body is on edge. And unlike RLS, it doesn’t wait for nighttime. It hits while you’re watching TV, in a meeting, or trying to sleep.

How Restless Legs Syndrome Is Different

RLS is often mistaken for akathisia, but the differences matter. RLS is tied to inactivity and usually gets worse at night. You feel tingling, crawling, or pulling deep in your legs-sometimes only when lying down. Moving helps. Walking around, stretching, even shaking your legs gives temporary relief. It’s not about inner agitation-it’s about physical sensation.

RLS often runs in families and links to low iron, kidney disease, or pregnancy. Medications like antidepressants or antihistamines can make it worse, but they don’t cause it the way antipsychotics cause akathisia. And here’s the kicker: drugs that treat RLS-like levodopa or gabapentin-can make akathisia worse. That’s why mixing them up leads to dangerous treatment errors.

Why Misdiagnosis Is Dangerous

Here’s the scary part: doctors often mistake akathisia for anxiety or agitation. If you’re pacing and fidgeting, they might think you’re "unstable" or "not responding well" to treatment. So they increase the dose of the very drug causing the problem. A 2017 study from the Royal Australian College of General Practitioners showed a patient on haloperidol developed suicidal thoughts because his doctor doubled his dose, thinking it was "worsening psychosis." The patient didn’t improve until the drug was stopped.

Research from the National Alliance on Mental Illness (NAMI) in 2022 found that 68% of people with medication-induced restlessness were first told they had anxiety. Over 40% of them had their antipsychotic dose increased-making their symptoms 10 times worse. One Reddit user wrote: "My doctor kept saying it was anxiety and doubled my Seroquel. The leg bouncing and inner turmoil got unbearable. I found akathisia on Wikipedia."

Akathisia isn’t just uncomfortable. It’s linked to aggression, violence, and suicide risk. The American Psychiatric Association warns that untreated akathisia can be more distressing than the psychosis it was meant to treat. In some cases, patients say they’d rather live with hallucinations than endure the torment of akathisia.

How to Recognize It

You don’t need a fancy test. A good clinician asks two simple questions:

• "Do you feel an inner urge to move that you can’t ignore?"
• "Does this feeling get worse when you sit still?"

Then they watch. Do you constantly shift your legs? Cross and uncross them? Rock back and forth? Tap your feet nonstop? These aren’t nervous habits-they’re involuntary movements tied to the drug.

The Barnes Akathisia Rating Scale (BARS) is the gold standard tool. It takes five minutes. It scores both how you feel inside and what you’re doing physically. Most clinics don’t use it-but you can ask for it. If your doctor doesn’t know what it is, that’s a red flag.

Treatment: What Actually Works

The best treatment is simple: stop or reduce the drug causing it. In the RACGP case study, one patient’s symptoms vanished in 72 hours after haloperidol was tapered. But sometimes you can’t stop the medication-your psychosis might return. So what then?

Three proven options exist:

1. Propranolol (a beta-blocker): Start with 10 mg twice a day. It helps calm the physical agitation. Works in about 60% of cases.
2. Clonazepam (a benzodiazepine): 0.5 mg at night. Reduces inner restlessness. Use cautiously-risk of dependence.
3. Cyproheptadine (an antihistamine): 4 mg daily. Often overlooked, but effective in trials.

Don’t use levodopa or gabapentin. They help RLS, not akathisia. And avoid increasing the antipsychotic. That’s the last thing you want.

What’s New in 2026

There’s real progress. In 2023, the International Parkinson and Movement Disorder Society launched a free app for clinicians with diagnostic checklists and treatment algorithms. It’s already in use in Australia, Canada, and parts of the U.S.

Research is also moving fast. A May 2024 JAMA Neurology study found specific brainwave patterns (EEG) that predict akathisia before symptoms even appear. And a 2023 trial of pimavanserin (Nuplazid), a drug originally for Parkinson’s psychosis, cut akathisia symptoms by 62% in patients on antipsychotics.

Even AI is getting involved. Stanford’s 2024 pilot study used video calls to detect akathisia movements with 89% accuracy-no extra tools needed. Imagine your telehealth visit automatically flagging restless leg movements as a possible side effect.

What to Do If You Suspect It

If you’re on an antipsychotic and feel this relentless urge to move:

• Write down when it started. Did it begin after a dose change?
• Track when it’s worst. Is it only at night? Or all day?
• Notice what helps. Does walking help? Or does it make you feel worse?
• Ask your doctor: "Could this be akathisia? Can we check with the Barnes scale?"
• Bring this article. Most doctors haven’t been trained to recognize it.

If you’re being told it’s "just anxiety" and your dose keeps going up? Get a second opinion. Talk to a psychiatrist who specializes in movement disorders. Don’t wait until it gets unbearable.

Bottom Line

Akathisia is not rare. It’s common. And it’s often missed. If you or someone you know is on an antipsychotic and can’t sit still, don’t assume it’s "normal" or "in your head." It’s a real, drug-induced condition with real consequences. The good news? It’s often reversible. Stop the drug-or add the right treatment-and relief can come fast. The key is recognizing it early. Before it turns into something worse.