Yes, certain muscle relaxers can be addictive, particularly with prolonged use or misuse. The risk varies significantly depending on which medication you’re taking. Some muscle relaxers act on the brain in ways that closely resemble drugs with well-known addiction potential, while others carry minimal risk. Prescribing guidelines generally limit muscle relaxer use to a maximum of two to three weeks to reduce the chance of dependence.
Why Some Muscle Relaxers Are Addictive
Not all muscle relaxers work the same way, and that difference is what determines addiction risk. The highest-risk muscle relaxer is carisoprodol, which acts on GABA receptors in the brain in a manner strikingly similar to barbiturates. GABA is the brain’s primary calming chemical, and drugs that amplify its effects tend to produce sedation, relaxation, and sometimes euphoria. Carisoprodol both boosts the brain’s natural GABA signaling and directly activates GABA receptors on its own, which is the same pattern seen in drugs that are widely recognized as habit-forming.
This barbiturate-like activity is not just a side effect of the drug breaking down in your body. Research published in The Journal of Pharmacology and Experimental Therapeutics confirmed that carisoprodol itself, not just its breakdown product (a substance called meprobamate), drives these effects. The drug was more potent at activating GABA receptors than meprobamate alone. That direct brain activity is a major reason carisoprodol carries real abuse potential.
Because of this evidence, the DEA placed carisoprodol into Schedule IV of the Controlled Substances Act, effective January 11, 2012. The FDA’s recommendation was based on three findings: the drug has a currently accepted medical use, it has a low but real potential for abuse, and misuse may lead to limited physical or psychological dependence. Schedule IV is the same category that includes benzodiazepines like alprazolam and lorazepam.
Other muscle relaxers, such as cyclobenzaprine and methocarbamol, are not classified as controlled substances because they don’t interact with the brain’s reward system in the same direct way. That said, any drug that produces sedation or a noticeable “high” can be misused, and cyclobenzaprine does show up in some cases of intentional misuse.
How Common Is Muscle Relaxer Misuse?
Federal survey data groups muscle relaxers with other tranquilizers and sedatives, making exact numbers hard to isolate. But the scale is significant. In 2024, approximately 4.6 million Americans aged 12 or older misused prescription tranquilizers or sedatives, a category that includes muscle relaxers alongside benzodiazepines. That represents about 1.6% of the population in that age group. These numbers have held steady from 2021 through 2024 with no significant change, suggesting the problem isn’t shrinking.
What Withdrawal Looks Like
Physical dependence on muscle relaxers, particularly baclofen and carisoprodol, can produce a real withdrawal syndrome when the drug is stopped abruptly. This is one of the clearest signs that these medications create changes in the brain that go beyond simple pain relief.
Baclofen withdrawal can be especially severe. Symptoms range from agitation, insomnia, and confusion to hallucinations, seizures, psychosis, and dangerously high body temperature. In some cases, abrupt cessation has been life-threatening, requiring intensive care. These risks apply whether the drug was taken by mouth or delivered through a spinal pump. Patients on long-term baclofen therapy are at the highest risk, and symptoms tend to appear when drug levels in the brain drop quickly. Most cases of serious withdrawal happen when someone stops the medication suddenly rather than tapering the dose gradually.
Carisoprodol withdrawal can cause anxiety, insomnia, tremors, and in severe cases, seizures. Because the drug’s effects mimic barbiturates, the withdrawal pattern follows a similar course.
Signs of a Developing Problem
Addiction to muscle relaxers often develops gradually. Early warning signs include needing a higher dose to get the same relief, taking the medication more often or in larger amounts than prescribed, and feeling strong urges to use the drug that crowd out other thoughts.
More advanced signs include:
- Preoccupation with supply: making sure you never run out, requesting early refills, or visiting multiple doctors
- Functional decline: missing work, pulling away from social activities, or neglecting responsibilities
- Continued use despite harm: knowing the drug is causing problems in your life or health but being unable to stop
- Failed quit attempts: trying to stop and experiencing intense cravings or physical withdrawal symptoms that pull you back
- Behavioral changes: doing things you normally wouldn’t do to obtain the drug, or using it in risky situations like before driving
A key progression to watch for: you initially take the medication to manage pain, then you find yourself taking it to feel good, and eventually you need it just to feel normal. That shift from pain relief to mood regulation to baseline maintenance is the classic trajectory of dependence.
The Danger of Mixing With Other Depressants
Muscle relaxers become far more dangerous when combined with other substances that slow the central nervous system. The FDA has issued its strongest warning, a Boxed Warning, about the risks of combining opioids with benzodiazepines and other central nervous system depressants, a category that explicitly includes muscle relaxers.
The combination can cause profound sedation, severely slowed breathing, coma, and death. An FDA analysis of overdose deaths involving opioid painkillers found that muscle relaxers and other central nervous system depressants were contributing factors in many of those fatalities. Alcohol amplifies these risks further. If you’re taking a muscle relaxer alongside an opioid, a benzodiazepine, or drinking alcohol, the sedation from each substance doesn’t just add up; it multiplies.
Reducing Your Risk
The most protective factor is duration. Clinical guidelines recommend limiting muscle relaxer use to two to three weeks, partly because there’s little evidence they remain effective beyond that window and partly because dependence risk climbs with longer use. If you’ve been taking a muscle relaxer for more than a few weeks, the safest path is a gradual taper rather than stopping cold.
Which muscle relaxer you’re prescribed also matters. If you have a personal or family history of substance use problems, that’s important information for whoever is prescribing your medication. Muscle relaxers that don’t act directly on GABA receptors, and that aren’t classified as controlled substances, carry a lower risk profile. Your prescriber can factor in your individual history when choosing a medication and monitoring how long you stay on it.