MECHANISM OF ACTION
Like classic psychedelics, 2C-B mimics the neurotransmitter serotonin at the brain's serotonin receptors. Unlike classic psychedelics, which activate serotonin receptor subtype 2A, 2C-B has little activity at this receptor subtype, and its main effects are thought to be due to activity at serotonin receptor subtype 2C. 2C-B also activates the α1-adrenergic receptor and apparently inhibits dopamine reuptake in the nucleus accumbens.
DURATION
The duration of 2C-B can vary depending on the dose, tolerance, and method of intake. For most, the effects of a normal dose can last up to six hours when swallowed and up to four hours when snorted or taken rectally. When swallowed, the effects are usually felt after 20 to 40 minutes, while snorting or rectal intake can produce noticeable effects within just a few minutes.
INTOXICATING EFFECTS
At low doses, such as 10 to 15 mg swallowed, 2C-B is often considered an entactogen or empathogen, i.e., in the same category as MDMA. The effects are usually moderately stimulating with mild psychedelic qualities, and it is common to feel happy, giggly, empathetic, and sociable. The first 20 to 30 minutes of the high can often be a bit uncomfortable, and one may experience transient nausea, muscle tension, or anxiety. After this, one can feel more bodily comfort, and some experience increased libido and sexual pleasure as the effects stabilize or towards the end of the high.
At higher doses, such as more than 15 mg swallowed, 2C-B becomes a more psychedelic drug. This is primarily noticed by strong visual effects and audiovisual synesthesia (blending of hearing and sight) when listening to music. The visual effects usually consist of moving geometric patterns that occur in surfaces and objects one looks at, and one can see both abstract geometric figures and concrete, dream-like images with closed eyes. 2C-B is less mentally challenging than LSD or psilocybin mushrooms and more similar to mescaline, albeit with stronger visual effects. However, this does not mean that one cannot have mentally challenging or uncomfortable experiences with 2C-B, especially if the dose is high.
UNPLEASANT EXPERIENCES ("BAD TRIPS")
Although the risk of unpleasant experiences is lower with 2C-B than with some psychedelics, the free thought associations can cause unwanted thoughts to stick and steer the experience in the wrong direction. The user must therefore learn either to control this or to accept the thoughts as they come. Circumstances and surroundings (mood, place, music, and who one is with) play a significant role in whether one has a (un)pleasant experience. The simplest way to avoid an unpleasant experience is to take a responsible dose. Additionally, certain personality types are probably more susceptible; if one struggles with anxiety and intrusive thoughts, one should either avoid psychedelics or proceed cautiously with low doses. Some women find that the menstrual cycle can affect the risk of an unpleasant experience.
If one has an unpleasant experience, it will usually help to change surroundings, switch music, or distract oneself in another way. If this does not help, it is better to "let go" and let the thoughts unravel themselves rather than trying to resist. In such cases, it may be good to have a quiet place to lie down and rest until it gets better, and to have someone nearby who looks after you. This person should remind you that it will pass, that everything is okay, and that you are safe, but not be too pushy, as communication can be stressful.
POWERFUL OR DEEPLY MEANINGFUL EXPERIENCES
Psychedelic experiences can provide powerful impressions that require processing afterwards. The user's perception of reality is challenged, which can provoke pondering over big, existential questions. One may also be confronted with unpleasant aspects of oneself and one's life as subconscious psychological material surfaces during the high. This can be rewarding in the long term, but is not necessarily trouble-free. It is not uncommon for people to change behavior or make significant changes in their lives after a powerful psychedelic experience, and research shows that a single use of psychedelics can cause lasting change in the personality domain of openness to new experiences. This effect is particularly noticeable for some time just after the first experience, and one should be careful about making significant decisions during this period. Most users find powerful psychedelic experiences to be positive in hindsight, even those that are very demanding or unpleasant while they occur. Nevertheless, it is recommended that one approach psychedelics prepared and with great respect, and have someone to talk to about their experiences.
PHYSICAL SIDE EFFECTS
2C-B is strongly physically stimulating, and it is common to experience muscle tension, trembling, and chills, especially during the first part of the high. Some also experience nausea, albeit to a lesser extent than with mescaline. 2C-B also causes typical stimulant side effects, such as dilated pupils and jaw tightness.
Men may experience moderate problems with achieving an erection under the influence of 2C-B, but not necessarily a reduced ability to achieve orgasm.
The use of 2C-B usually results in no significant hangover, but some people occasionally experience a mild to moderate headache parts of the next day. This is usually most noticeable if one has had little sleep.