Cyclobenzaprine (Flexeril) Withdrawal: Symptoms and Stopping Safely

The bigger risks with cyclobenzaprine usually aren’t withdrawal. They’re mixing it with alcohol, opioids or other sedatives, and a rare but serious interaction with some antidepressants and pain medicines. This guide covers what to expect when you stop, how to do it safely, and when it’s a sign of something more than a muscle relaxant.

Can you stop taking cyclobenzaprine cold turkey?

After a short course of a few days to two or three weeks, which is how it’s meant to be used, most people simply stop when the muscle pain improves. That’s normal and generally safe.

After months of daily use, stopping all at once can occasionally bring on nausea, headache and malaise. These are uncommon and usually mild, but a gradual reduction can make them less likely. Your prescriber can tell you whether a taper makes sense for your dose and how long you’ve been taking it. Don’t change your dose without talking to them, especially if you take other medicines.

Cyclobenzaprine withdrawal symptoms

The symptoms listed in the FDA-approved labeling are:

• Nausea
• Headache
• Malaise, a general feeling of being unwell or run down

People also commonly notice two things that aren’t really withdrawal:

• The original pain or spasm comes back. Cyclobenzaprine relieves muscle spasm; it doesn’t heal the injury. If the underlying problem hasn’t resolved, symptoms can return when you stop.
• Sleep changes. Drowsiness is one of its most common side effects. Some people who took it at night notice they don’t sleep as easily without it.

If you develop severe symptoms, or anything like confusion, fever, a racing heart or muscle twitching, contact a doctor straight away. Those aren’t typical of stopping cyclobenzaprine and need checking.

How long does cyclobenzaprine withdrawal last?

There isn’t a well-studied timeline, because withdrawal symptoms are rare and mild enough that they haven’t been researched in detail. What we do know is that cyclobenzaprine leaves the body slowly. The prescribing information gives a half-life ranging from about 8 to 37 hours, so it takes several days to clear completely. Any discontinuation symptoms would usually appear within that window. If symptoms are severe or don’t settle within a few days, call your prescriber.

Is cyclobenzaprine addictive?

Cyclobenzaprine isn’t a controlled substance, and its labeling says discontinuation symptoms are “not indicative of addiction.” Most people who take it as prescribed don’t develop problems.

It can still be misused, though, usually for its sedating effect and usually alongside other substances. Signs that use has gone beyond a prescription include:

• Taking more than prescribed, or taking it after the pain has gone
• Getting it from other people or more than one prescriber
• Using it to feel relaxed or “buzzed” rather than for muscle spasm
• Combining it with alcohol, opioids, benzodiazepines or cannabis to increase the effect

The risks that matter more than withdrawal

• Alcohol and sedatives. Cyclobenzaprine makes the effects of alcohol worse and adds to other drugs that slow the nervous system, including opioids, benzodiazepines and sleep medicines.
• Older adults and liver problems. The extended-release form isn’t recommended for older adults or people with liver impairment, and other forms are used with caution.
• Driving. It commonly causes drowsiness and dizziness.

How to stop cyclobenzaprine safely

1. Talk to your prescriber first, especially if you’ve taken it daily for more than a few weeks or take antidepressants or opioids.
2. Ask about tapering if you’ve used it for a long time. A gradual reduction can make symptoms less likely.
3. Have a plan for the pain. Physical therapy, stretching, heat and other treatments your doctor recommends can help if spasms return.
4. Don’t replace it with alcohol or other sedatives to help you sleep or relax.
5. Call a doctor if symptoms are severe, don’t improve within a few days, or include confusion, fever or a racing heart.

When you might need medical detox

Cyclobenzaprine on its own rarely needs a detox program. It becomes a different situation when it’s part of a pattern with other substances. Withdrawal from alcohol and benzodiazepines can cause seizures, and opioid withdrawal is hard to get through alone. Stopping several substances at once is safest with medical supervision.

At Tru Dallas Detox & Recovery Center in Euless, between Dallas and Fort Worth, prescription pill detox happens under 24/7 medical supervision, with medications to manage withdrawal safely. After detox, many people continue into residential treatment. If outpatient care is a better fit, our team can assist in finding outpatient options. For typical timelines by substance, see how long detox takes.

Frequently asked questions

Last updated: October 2026. This page is general information, not medical advice. Don’t stop or change a prescribed medicine without talking to your prescriber. Sources: cyclobenzaprine FDA prescribing information; MedlinePlus cyclobenzaprine.