2C-B is a synthetic psychedelic in the phenethylamine family. It can alter perception, mood and thinking and can also increase heart rate and blood pressure. Research in people is limited, especially for repeated use, interactions and long-term outcomes. This uncertainty does not establish a safe recreational dose or make 2C-B a risk-free alternative to MDMA.
What is known about 2C-B?
Small studies have investigated its acute effects in volunteers. A controlled study published in 2026 compared 2C-B with MDMA, psilocybin and placebo in 24 healthy participants. Such research helps describe effects under selected study conditions; it does not establish that recreational products are safe or that the substance treats a mental health condition.
2C-B is a different substance from MDMA. Simplified claims that it avoids serotonin depletion and therefore avoids MDMA-related risks are not a sound basis for choosing a drug. Differences observed in a small study cannot establish a general safety ranking across doses, people and settings.
Effects and potential harms
Reported effects include altered visual perception, hallucinations, anxiety, confusion, agitation and changes in physical sensations. Heart rate and blood pressure can rise. Impaired attention and judgment can increase the risk of injury or unsafe decisions.
A Dutch poison-centre study described exposures reported between 2016 and 2018, with follow-up available for only part of the group. Most observed poisonings were moderate, and no severe cases were observed in that study. Limited follow-up and incomplete confirmation of substances mean that the findings cannot rule out serious harm or identify a safe amount.
Uncertain product contents
A tablet’s color, logo, name or appearance cannot confirm its ingredients or strength. A product sold as 2C-B may contain something different. This makes effects and interactions harder to predict. Mixing it with alcohol or other substances adds uncertainty and can increase risk.
“Pink cocaine” or “tusi” should not be assumed to contain 2C-B. The DEA describes these as variable drug mixtures whose ingredients cannot be established from the name or color. Symptoms after an unknown mixture may require treatment for several possible substances.
When to get urgent help
Call local emergency services for a seizure, collapse, severe overheating, chest pain, breathing difficulty, inability to wake or severe confusion that makes someone unsafe. Stay with the person, move away from immediate hazards if possible and follow the dispatcher’s instructions. Do not let them drive.
Tell clinicians what was taken, when, and whether medicines or other substances were involved. Bring available packaging without delaying care. Do not wait for a known toxic dose or expected duration, and do not give another drug to counteract the effects. A quiet setting or sober companion cannot guarantee safety.
Repeated use and support
Evidence is insufficient to quantify the likelihood of a 2C-B use disorder or establish a typical withdrawal course. It is inappropriate to label it either highly addictive or reliably non-addictive from its similarity to another drug or from a single proposed brain mechanism.
Seek an assessment if use becomes difficult to control, occupies increasing time, continues despite harm or affects relationships, work or mental health. Support can address the pattern of use and associated needs. Residential treatment is not automatically required; the appropriate setting follows an individual assessment.
