Emergency? Call 911. Poison Help: 1‑800‑222‑1222 (free, 24/7)

Phenibut.org

Category: Blog

  • Does Phenibut Help With Anxiety?

    Last reviewed September 2026

    A lot of people first try phenibut because they’ve read it helps with anxiety, especially social anxiety. Here’s what’s actually known.

    Where it’s used for anxiety

    In Russia, phenibut is a prescription medicine for anxiety and insomnia, and it has been used that way since the 1960s. Most of the research behind that use was done in Russia and the former Soviet Union. It hasn’t gone through the kind of large, controlled trials U.S. or European regulators ask for, and it isn’t approved as a medicine in the U.S. or Western Europe.

    When the World Health Organization’s drug dependence experts looked at phenibut in 2021, they noted how little solid information exists on how often it’s misused and how hard it is to stop.

    The problem with using it for anxiety

    Many people do feel calmer on phenibut at first. The catch is how fast the body adapts. Tolerance can build within one to two weeks of regular use, and one of the main withdrawal symptoms is severe anxiety. People who start taking it to calm their nerves can end up more anxious than before, plus dependent on a drug that’s hard to quit.

    It also adds to the effects of alcohol, which some people use for the same reason. In U.S. poison center reports, about 40 percent of adult phenibut cases involved other substances as well.

    Other options

    Anxiety is very treatable. Talk therapy such as cognitive behavioral therapy works well for many people, and there are several approved medicines a doctor can go over with you. If cost or access is a barrier, the SAMHSA National Helpline at 1-800-662-4357 can point you to low-cost services near you.

    If you’re already taking phenibut for anxiety and want to stop, read our withdrawal page first and talk to a doctor before cutting it out.

    Sources

  • Phenibut Withdrawal: Symptoms, Risks and Treatment

    Last reviewed September 2026

    If you’ve been taking phenibut regularly, your body has probably adjusted to it. When you stop or cut back, the nervous system is left without the calming effect it has gotten used to, and that’s withdrawal. For some people it’s rough but manageable. For others it’s dangerous.

    Symptoms

    Symptoms reported in medical case reports and reviews include:

    • strong anxiety and restlessness
    • trouble sleeping
    • agitation and irritability
    • body pain or a burning feeling under the skin
    • hallucinations or psychosis
    • seizures and delirium, especially after stopping suddenly

    Some people also have thoughts of suicide during withdrawal. If that happens, call or text 988 right away.

    Withdrawal doesn’t always pass quickly. In one published case, symptoms came and went for several months and led to multiple emergency room visits.

    Why stopping suddenly is risky

    Doctors compare phenibut dependence to dependence on benzodiazepines. With those drugs, stopping all at once after heavy use can trigger seizures and delirium, and case reports show the same thing with phenibut. If you’ve been using it every day, don’t stop on your own. Talk to a doctor first so the process can be planned and watched.

    How doctors treat it

    There isn’t a standard treatment protocol yet. A 2023 review in Clinical Toxicology looked at 25 published cases of phenibut withdrawal:

    • 17 patients were given benzodiazepines
    • 14 were given baclofen, a prescription drug that acts on the same receptor as phenibut
    • 10 were given antipsychotics, and 10 were given barbiturates
    • three out of four needed at least two medicines

    Some people have been taken off phenibut as outpatients with a slow, doctor-supervised baclofen taper. Others with severe symptoms needed hospital care. Which approach fits depends on how much and how long someone has used, what else they take, and their health, so it’s a decision to make with a clinician.

    What to tell your doctor

    It helps to be specific. Doctors see this, and the details change how they treat it.

    • the product name, or bring the package
    • how long you’ve been using it and how often
    • roughly how much you take
    • any alcohol, kratom, opioids, sleep aids or other drugs you use
    • any past seizures or withdrawal problems

    If you don’t have a doctor, the SAMHSA National Helpline at 1-800-662-4357 can refer you to local treatment. It’s free, confidential and open 24/7. More options are on our getting help page.

    Get emergency care for

    • a seizure
    • hallucinations, severe confusion or not knowing where you are
    • thoughts of harming yourself

    Sources