Baclofen can produce feelings of euphoria, relaxation, and reduced anxiety in some people, and those effects are exactly why it gets misused. But baclofen was never designed as a recreational drug. It is a prescription muscle relaxant, and the gap between a dose that feels pleasant and a dose that lands someone in an intensive care unit is dangerously narrow. The drug’s ability to suppress basic functions like breathing and heart rate means that chasing a high with baclofen is one of the riskier forms of prescription drug misuse.
How Baclofen Affects the Brain
Baclofen works by activating a specific type of receptor in the brain and spinal cord that slows down nerve signaling. When those receptors are activated, the release of several chemical messengers in the central nervous system drops.1PubMed. (-)Baclofen decreases neurotransmitter release in the mammalian CNS by an action at a novel GABA receptor That broad dampening effect is what makes muscles relax and spasticity ease up, but it also affects mood, alertness, and anxiety levels. At therapeutic doses, most people just feel slightly sedated. At higher doses, the sedation deepens, inhibitions loosen, and some users describe a floaty or euphoric sensation. The mechanism is fundamentally similar to how alcohol and certain sedatives work, though baclofen targets a different receptor subtype than most of them.
What the “High” Actually Feels Like
Reports from clinical settings give a window into what baclofen feels like when taken at doses above standard prescriptions. In a case series of patients receiving high-dose baclofen for alcohol dependence, one patient described an immediate feeling of euphoria along with a noticeable drop in anxiety.2Frontiers in Psychiatry. The Use of Very High-Doses of Baclofen for the Treatment of Alcohol-Dependence: A Case Series Another patient in the same series reported that baclofen had a stimulant-like effect, making him feel calmer and less aggressive, while also acknowledging that he sometimes took it as though it were a drug of abuse. That same patient noted that other sedatives like alprazolam also made him “feel high,” suggesting that people with a history of substance use are more likely to experience and pursue baclofen’s psychoactive effects.
The experience is not consistent across all users, though. Many people who take baclofen for spasticity or pain report drowsiness and dizziness without any sense of euphoria. The “high” seems to depend on dosage, individual brain chemistry, and whether someone has a prior history of using sedatives or alcohol. People without that history often find higher doses simply unpleasant, producing heavy sedation, nausea, or confusion rather than anything enjoyable.
Prescribed Uses and How Misuse Begins
Baclofen’s approved medical role is treating spasticity, the stiffness and involuntary muscle spasms that come with conditions like spinal cord injuries, multiple sclerosis, and cerebral palsy. It is considered one of the most effective drugs for this purpose and can be given either as a pill or delivered directly into the spinal fluid through an implanted pump for more severe cases.3Mary Ann Liebert, Inc., publishers. Role of Baclofen in Modulating Spasticity and Neuroprotection in Spinal Cord Injury At standard doses for spasticity, the risk of a “high” is low because the amounts involved are modest.
Misuse tends to emerge from two pathways. The first involves people who are already prescribed baclofen and gradually escalate their dose beyond what was recommended, discovering psychoactive effects along the way. The second involves people who obtain baclofen specifically to get high, often because they have read about its effects online or have experience with chemically related substances. In countries where baclofen is not a controlled substance, getting hold of it requires only a standard prescription, making it more accessible than many other drugs with sedative properties.
The off-label use of baclofen for alcohol use disorder has added another layer. Doctors have experimented with doses ranging from the typical 30 to 80 milligrams per day up to more than 300 milligrams per day in an effort to curb alcohol cravings, though the evidence on whether this works is inconsistent.4Frontiers in Psychiatry. The Use of Baclofen as a Treatment for Alcohol Use Disorder: A Clinical Practice Perspective These high-dose prescriptions put substantially more baclofen into circulation, and the people receiving them often have histories of addiction, which raises the likelihood of misuse. In France, where high-dose baclofen prescribing for alcohol problems became widespread, poison center reports of baclofen poisoning rose dramatically, from 8 cases in 2008 to 91 in 2015.5PubMed. Baclofen Self-Poisoning in the Era of Changing Indication: Multicentric Reports to a French Poison Control Centre
Who Is Most Likely to Misuse Baclofen
Research into non-medical baclofen use shows a clear pattern. The typical person misusing it is male and already has a history of substance use problems.6PubMed. Non-medical use of baclofen: A case series and review of the literature That fits with broader trends in prescription drug misuse, where people with prior experience using sedatives, opioids, or alcohol are more drawn to drugs that affect similar brain pathways. However, the same review noted cases of primary abuse, meaning people without any prior substance use history who began misusing baclofen on its own. That complicates the idea that only “addicts” are at risk.
UK monitoring data collected over eight years found 19 reports of baclofen misuse, abuse, or dependence, alongside similar reports for gabapentin and pregabalin. Across all three drugs, about three-quarters of the people involved were male, the median age was 35, and nearly half were also using other substances at the same time. Symptoms of dependence showed up in roughly 40% of cases.7British Journal of Clinical Pharmacology. Misuse of the γ-aminobutyric acid analogues baclofen, gabapentin and pregabalin in the UK Those numbers are small in absolute terms, which reflects the fact that baclofen misuse is far less common than opioid or benzodiazepine misuse. But they also show that genuine dependence develops in a meaningful fraction of people who misuse it.
What Happens in an Overdose
Baclofen overdose is genuinely dangerous, and the margin between a dose that produces euphoria and a dose that causes serious toxicity is not wide. Mild intoxication looks like excessive drowsiness, confusion, and sluggishness. Beyond about 200 milligrams per day, more severe problems emerge: drops or spikes in blood pressure, dangerously slow heart rate and breathing, and seizures.8BMJ Case Reports. Neurological evolution of severe baclofen intoxication: from brain death mimic to recovered brain function
The full picture of severe baclofen poisoning is alarming. Symptoms typically appear within two to six hours of ingestion and can include respiratory depression, complete loss of muscle tone, absent reflexes, low body temperature, heart rhythm abnormalities, and hallucinations. In the worst cases, people enter a prolonged coma with no detectable brainstem reflexes, a state so profound that it can be mistaken for brain death.9J Pediatr Emerg Intensive Care Med. Recognizing and Managing Life-threatening Toxicity in Pediatric Baclofen Poisoning: A Case Report This “brain death mimic” phenomenon is one of the more unsettling features of baclofen overdose. Patients can appear clinically dead by standard neurological exams and still recover fully once the drug clears their system, but only if they receive aggressive supportive care in the meantime.
The seizures that occur with baclofen overdose deserve special mention. They stem from a paradoxical effect: at toxic concentrations, baclofen’s excessive suppression of certain inhibitory brain circuits actually lowers the threshold for seizure activity. The seizures are usually brief and respond to treatment, but they add a dangerous complication on top of everything else happening in the body during an overdose.
Tolerance Develops Fast
One reason baclofen misuse tends to escalate is that the body adapts to the drug quickly. Animal research shows that after just a week of continuous baclofen exposure, the number of receptors the drug targets in the spinal cord drops to about two-thirds of normal levels. That receptor reduction lines up directly with tolerance to the drug’s muscle-weakening effects.10PubMed. Intrathecal baclofen down-regulates GABAB receptors in the rat substantia gelatinosa In plainer terms, the brain starts hiding the locks when it senses too many keys being inserted.
Research in rats found that while a single dose of baclofen dramatically reduced both movement and brain activity across many regions, animals that received the drug repeatedly stopped showing those effects in most brain areas.11PubMed Central. Differential development of tolerance to the functional and behavioral effects of repeated baclofen treatment in rats The practical consequence for someone misusing baclofen is predictable: the same dose stops producing the desired effect, so they take more. And more baclofen means a higher chance of crossing into overdose territory, especially because tolerance to the pleasant effects does not necessarily mean tolerance to the drug’s ability to suppress breathing and heart function.
Withdrawal Can Be Life-Threatening
Once someone is taking baclofen regularly at substantial doses, stopping abruptly is dangerous. Baclofen withdrawal syndrome can produce a range of symptoms from sedation, sleepiness, and weakness to psychological disturbances including agitation and delirium.12PubMed Central. Oral Baclofen Withdrawal Resulting in Progressive Weakness and Sedation Requiring Intensive Care Admission In one documented case, a woman whose oral baclofen was accidentally not continued after she was transferred to a nursing facility developed altered mental status and respiratory failure severe enough to require intensive care.
Withdrawal does not always look the same. Some patients develop hyperactive delirium with behavioral disturbances, perceptual changes, and involuntary movements.13PubMed Central. Oral Baclofen Withdrawal Resulting in Hyperactive Delirium: A Case Report The presentation can mimic alcohol withdrawal or benzodiazepine withdrawal, which makes sense given that all three involve the brain’s inhibitory signaling system rebounding after the drug is removed.
For patients who receive baclofen through an intrathecal pump, the stakes are even higher. If the pump malfunctions or runs out of drug unexpectedly, the result can be catastrophic. One case involved a 24-year-old man with cerebral palsy whose pump stopped due to a programming error. He developed dangerously high body temperature, his blood’s clotting system went haywire, his muscles broke down, his kidneys failed, and multiple organ systems collapsed.14PubMed Central. Intrathecal baclofen withdrawal syndrome- a life-threatening complication of baclofen pump: a case report Intrathecal withdrawal is a medical emergency that can be fatal if not recognized and treated immediately.
Mixing Baclofen with Other Drugs
People who misuse baclofen rarely use it alone. Nearly half of the UK misuse cases involved other substances at the same time, and the drug’s sedative properties make combinations with other depressants particularly hazardous. Mixing baclofen with alcohol, benzodiazepines, or opioids multiplies the risk of respiratory depression because all these substances push the brain’s breathing centers in the same direction: down.
The baclofen-opioid combination has been studied in controlled settings, and there is a genuinely useful finding buried in the research. Animal studies showed that baclofen and opioids together produce a stronger pain-relieving effect than either drug alone, potentially allowing lower opioid doses for equivalent pain control, and without increased tolerance, constipation, or reward-seeking behavior.15The Journal of Pharmacology and Experimental Therapeutics. Interaction of Baclofen and Opioids on Analgesia and Abuse Potential That sounds promising for pain management in a clinical setting, but it also highlights how the two drug classes interact powerfully at a neurological level. Outside a controlled medical context, that powerful interaction becomes a powerful risk.
The Overlap with Phenibut and GHB
Baclofen gets discussed in online drug communities alongside two other substances: phenibut and GHB. All three target the same receptor type, which is why their effects overlap and why baclofen sometimes enters people’s lives through an unusual route. Phenibut is a widely available supplement in many countries that acts on the same receptors as baclofen. When people develop dependence on phenibut and try to quit, baclofen has been used to manage the withdrawal, though appropriate doses for this purpose are not well defined and may need to exceed standard approved doses.16PubMed. Seizure Occurring During Baclofen Monotherapy for Phenibut Withdrawal
A similar dynamic exists with GHB. Baclofen has been used to ease GHB withdrawal, and online forums contain dozens of discussion threads from people sharing their experiences with the substitution.17European Journal of Clinical Pharmacology. Baclofen in gamma-hydroxybutyrate withdrawal: patterns of use and online availability The logic is straightforward: because baclofen hits a similar receptor, it can soften the rebound that happens when GHB or phenibut is removed. But this also means that people familiar with the highs produced by GHB or phenibut are already primed to recognize and seek out baclofen’s psychoactive effects. Some transition from using baclofen as a withdrawal aid to using it recreationally, creating a new dependence while trying to escape an old one.
Accidental Pediatric Poisoning
A less obvious danger of baclofen misuse is the collateral risk to children in households where the drug is present. Baclofen tablets are small, and even a modest dose can be catastrophic for a child. One case involved a five-year-old boy who accidentally received a toxic dose and was admitted to a pediatric intensive care unit with convulsions, drowsiness, and a dangerously slow heart rate.18PubMed Central. Oral Baclofen Toxicity in a Pediatric Patient Managed Without Invasive Intervention: A Case Report and Literature Review Another case involved a four-year-old who fell into a deep coma after accidental ingestion. His brain showed signs of swelling, his brain-wave patterns indicated severe distress, and his blood baclofen level was extremely high. He required mechanical ventilation for 36 hours before recovering normal neurological function.19PubMed. Report of severe accidental baclofen intoxication in a healthy 4-year-old boy and review of the literature
Children process drugs differently than adults. They are more sensitive to baclofen’s effects on the brain and cardiorespiratory system, and what might cause moderate sedation in an adult can produce coma and respiratory arrest in a child. As off-label high-dose prescribing has increased the amount of baclofen in homes, the risk of accidental pediatric exposure has grown alongside it. Standard childproofing of medication storage is especially important with baclofen because the consequences of a child swallowing even a few extra tablets are severe and rapid.
How Baclofen Overdoses Are Treated
There is no antidote for baclofen. Treatment for overdose is fundamentally about keeping the person alive while the drug clears their system. That means managing their airway, supporting breathing with mechanical ventilation if needed, treating seizures, and stabilizing blood pressure and heart rhythm.20PubMed Central. Role of hemodialysis in baclofen overdose with normal renal function In many cases, patients require days of intensive care before the drug’s effects fully wear off.
Whether hemodialysis (using a machine to filter the drug out of the blood) helps in baclofen overdose is a question that comes up repeatedly, and the honest answer is that it remains controversial. An international expert workgroup reviewed the evidence and recommended against routine hemodialysis in patients whose kidneys are working normally, suggesting it only in cases where baclofen toxicity occurs alongside kidney impairment and the patient is in a coma requiring mechanical ventilation.21Kidney International. Extracorporeal treatments in poisoning: recommendations for severe baclofen poisoning Even when hemodialysis has been used in severe cases with normal kidney function, subsequent analysis has suggested that recovery was likely due to the body clearing the drug naturally rather than the dialysis itself.22PubMed Central. Severe baclofen intoxication managed with hemodialysis: a case report and review of the literature
Rising Poison Center Reports
The trend lines are moving in the wrong direction. U.S. poison center data showed that intentional baclofen exposures increased by about 43% over a four-year period.23PubMed. Trends in gabapentin and baclofen exposures reported to U.S. poison centers In France, where high-dose baclofen prescribing for alcohol problems took off earlier than elsewhere, the increase was even more dramatic. These numbers reflect a combination of more baclofen being prescribed, more awareness of its psychoactive potential, and the reality that people with substance use problems are disproportionately represented among those receiving prescriptions.
Baclofen is not scheduled as a controlled substance in most countries, which means it does not carry the same regulatory barriers to prescribing and dispensing as benzodiazepines or opioids. That lower regulatory profile made sense when baclofen was used primarily as a muscle relaxant at modest doses. As its use has expanded and reports of misuse, dependence, and poisoning have climbed, some pharmacologists and addiction specialists have begun questioning whether the drug’s regulatory classification still matches its risk profile. Whether that debate leads to reclassification or simply tighter prescribing guidelines remains an open question, but the data on rising misuse make it harder to argue that baclofen’s current status adequately reflects the harm it can cause when used outside its intended purpose.