2cb illustration


Nexus, Bees, Venus, Bromo mescaline 1

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2C-B is a psychedelic drug similar to mescaline. It was first synthesised by Alex Shulgin in 1974 and is considered to have effects that lie somewhere between that of LSD and MDMA 2.

2C-B commonly comes in the form of a pill or a powder (pills are usually white but can be any colour) and is often sold as ecstasy in the underground rave scene, despite being a very distinct substance with markedly different effects at higher doses.

At lower doses, the experience can in fact be similar to ecstasy, with feelings of empathy, euphoria, and a greater appreciation for music. Yet, at higher doses, closed and even open-eye visuals can be present as well as spiritual insights and a “softening” of the ego 3.


Set and setting

Aim to have 2-CB in a controlled, familiar and relaxed environment with trusted companions.


Dose carefully

Taking a dose higher than 50mg can cause bodily discomfort, nausea and hyperthermia and an all around unpleasant experience.


Avoid mixing

Avoid mixing if possible and check the interactions section below if you do as 2-CB can have have dangerous interactions with other drugs.

Effects of 2C-B

Here are the most common effects, not everyone necessarily experiences all of them every time they consume the drug and other effects not listed might be felt. The likelihood of experiencing negative effects is far greater at high doses.

The effects are (from positive to negative):

  • Euphoria and laughter
  • Increased libido
  • Enhanced sensory awareness (sound, touch, vision) with closed and open eye visuals and synaesthesia 6
  • Empathic feelings 7
  • Feelings of great insight or spirituality
  • Increase in body temperature 8
  • Increased energy
  • A change in the perception of time
  • Insomnia
  • Nausea and vomiting*
  • Headaches (most likely to occur on the comedown)
  • Excessive sweating
  • Dizziness
  • Anxiety and paranoia*
  • Jitters*

Dose and onset of 2C-B

How? How Much? When? For how Long?

As with any drug, the correct dose for you depends on factors such as weight, gender, metabolism, whether you have taken the drug recently or not, amongst many others.

Read our section on dosing and tolerance for more information.

How you take 2C-B matters...

The least harmful way to consume 2C-B is orally: either via ingestion, which can mean swallowing a pill, “bombing” (wrapping 2C-B powder in cigarette paper and swallowing it) 10 or “gumming”, where the drug is rubbed into the gums with a fingertip.

Nasal intake has been reported to be extremely painful and is best avoided 11. Due to this we recommend avoiding this method of consumption. It is worth noting that taking the powder through the nose results in a much faster onset and a shorter total duration 12. There are reports of people smoking 2C-B, however the responses vary widely: some experiencing negative effects, minimal effects or none at all. It also makes it easier to take too much.

How much 2C-B?

  • Threshold - 2-5 mg
  • Light - 5-15 mg
  • Common - 15-25 mg
  • Strong - 25-50 mg (taking any amount greater than 50 mg puts the user at serious risk of adverse effects) 13.

Source: erowid.org

When do the effects of 2C-B kick in and for how long?

The main effects will likely last between 4 and 8 hours depending on the dose, the individual and the contents of their stomach. If taken orally without being on an empty stomach the onset can be delayed while the effects are slightly prolonged but also slightly diminished.

Oral 14:

  • Onset: 45-75 minutes
  • Come-up: 15-30 minutes
  • Plateau: 2-4 hours
  • Come-down: 1-2 hours
  • After effects: 2-4 hours


  • Onset: 1-10 minutes
  • Duration: 2-4 hours
  • Come-down: 1-2 hours
  • After-effects: 2-4 hours

Source: erowid.org

How often can I take 2C-B?

If you know of any good source containing this information please email us to contact@drugsand.me . We'll credit you in our Team section! Thanks :)

Interactions of 2C-B

2C-B + ? =

Select a drug

Click one of the drugs below and see how it mixes with 2C-B.

Source: tripsit.me

Harm Reduction for 2C-B

There are certain precautions you should take before doing 2C-B. The advice below helps you to be physically and mentally prepared before doing it. Furthermore, we want you to be safe, and just in case you have a bad experience or some of the unwanted side effects associated with 2C-B, we have also provided information on how to take care of yourself when you are in full swing. Finally, there are those uncomfortable or undesirable effects after the high have worn out, we will provide you with some practical tips on how to have a better calm down and help you to reduce the harm done to your body and brain.

Head over to our Dosing section if you would like to know more about harm reduction.

  • Timing. Consider the time at which you take the drug as the effects are relatively long and this can break havoc with your sleeping pattern.
  • See how you feel. Don´t take 2-CB if you feel down or depressed. This can easily lead to a bad trip.
  • In good company: Make sure you are in a safe and familiar environment with people you trust. It can mean the difference between a good and bad trip.
  • Create a music playlist. Listening to music can be comforting and may reduce the chances of having a negative experience.
  • Think about water beforehand. It is easy to become dehydrated during the experience ensure you have water easily available, be it at home or in a club.
  • Test the drug. This is especially important as 2C-B is often wrongly sold as ecstasy and vice-versa to a lesser extent. More importantly, harmful additives such as methamphetamine, bath salts and PMMA have been found in pills sold as ecstasy and 2C-B. We recommend that you always test your pills using a drug testing kit. Depending on the country you're in, there are places where you can send samples of your pills to be tested.

  • Remember to drink water. Aim for 1-2 cups per hour, too much is just as dangerous as not enough. This is particularly important when dancing or raving.
  • Wear layers. Better to wear two lighter layers than just one big coat.This will help you manage temperature fluctuations. Especially if you are going to an inside venue to dance while it is cold outside.
  • Have a sober friend with you. A “sitter” is invaluable be it to manage a bad experience in the group to helping you get home.
  • Look out for your friends. Check up on your group every now and then, this will also let them know that you are not having a difficult time either. This is especially important if there is no sitter present.
  • Have a chat. If a companion is having a difficult experience, it will be very beneficial to talk to them. It can help them feel more grounded and less anxious. Reassure them and use empathic language.
  • Remember it will be over soon. If you do have a difficult experience, try to remember that it will be over in a couple hours or less.

  • Insomnia. After a 2C-B experience you may have some residual energy leftover which can sometimes cause insomnia. There have been reports of individuals taking a benzodiazepine such as Valium to counteract this 19. Bear in mind that benzodiazepines tend to be regulated prescription drugs in most countries, such as the UK (Class C) 19, and it is an offence to procure them without a doctor’s prescription.
  • 5HTP supplementation. Taking one or two capsules before going to bed can reduce the hangover feelings the next morning. Many pharmacies sell it as a food supplement.
  • Avoid driving or operating heavy machinery. This is both dangerous and potentially illegal 20. Such activities should definitely not be done for at least 24 hours after the trip. Having enough sleep is crucial to feeling back to normal.

Risks of 2C-B

2C-B dependence

Dependence to 2C-B is unlikely but by no means impossible, but taking it over successive days will greatly reduce its effects due to an increased tolerance, known as tachyphylaxis 21. It is therefore self-limiting, as there is little reward for taking the drug continuously.

The Law on 2C-B



  • USA: Illegal, Schedule I section D 1995
  • Canada: Schedule III
  • Mexico:Illegal.

Asia and Australia

  • Australia: Illegal
  • New Zealand: Illegal
  • Singapore: Illegal
  • Hong Kong: Illegal
  • Israel: Illegal


  • South Africa: Illegal

More information, references, useful links...

More information


Can I take 2C-B if I am on SSRIs?

In theory, this is possible. However, a larger dose may be required and estimating this increase in dose can be risky and difficult 24.

Can I take 2C-B if I am on MAOIs?

Although this combination is unlikely to cause a fatality as it might with MDMA, it is best err on the side of caution and avoid 2C-B if you take MAOIs 25.

Can I take 2C-B if I am on Tricyclics?

Although there is no clear interaction between the two drugs, bear in mind that tricyclic antidepressants can potentiate the effects of benzodiazepines.

Can I take 2C-B if I have a heart condition?

This greatly depends on exactly what your diagnosis is. However, you can minimise the risks by not doing excessive physical activity such as dancing while on the drug.

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  1. "2C-B Street Names" (PDF). February 1, 2011.
  2. "2C-B (Nexus) Reappears on the Club Drug Scene" (PDF). National Drug Intelligence Center. Department of Justice. May 2001.
  3. Pharmacological Studies of Some Psychoactive Phenylalkylamines-Entactogens, Hallucinogens, and Anorectics, Nicholas Cozzi.
  4. Caudevilla-Galligo, F.; Riba, J.; Ventura, M.; González, D.; Farré, M.; Barbanoj, M. J.; Bouso, J. C. (2012). "4-Bromo-2,5-dimethoxyphenethylamine (2C-B): Presence in the recreational drug market in Spain, pattern of use and subjective effects". Journal of Psychopharmacology.
  5. "Erowid 2C-B Vault: Basics". Erowid
  6. https://en.wikipedia.org/wiki/Synesthesia
  7. Gonzalez D, Torrens M, Acute Effects of the Novel Psychoactive Drug 2C-B on Emotions.
  8. Carmo, H.; Hengstler, J. G.; De Boer, D. D.; et al. (2005). "Metabolic pathways of 4-bromo-2,5-dimethoxyphenethylamine (2C-B): Analysis of phase I metabolism with hepatocytes of six species including human". Toxicology. 206 (1): 75–89. doi:10.1016/j.tox.2004.07.004. PMID 15590110
  9. http://drugs.tripsit.me/2c-b
  10. http://www.synchronium.net/2010/05/06/how-to-make-a-bomb/
  11. https://erowid.org/chemicals/2cb/2cb_faq.shtml
  12. "Erowid 2C-B Vault: Effects". Erowid. Retrieved 2018-01-02.
  13. De Boer, D.; Gijzels, M. J.; Bosman, I. J.; Maes, R. A. A. (1999). "More Data About the New Psychoactive Drug 2C-B". Journal of Analytical Toxicology.
  14. "Erowid 2C-B Vault: Basics". Erowid. 2011-02-20
  15. Kanamori, Tatsuyuki, et al. In vivo metabolism of 4-bromo-2, 5-dimethoxyphenethylamine (2C-B) in the rat: identification of urinary metabolites. Journal of analytical toxicology 26.2 (2002): 61-66.
  16. https://www.webmd.com/depression/guide/serotonin-syndrome-causes-symptoms-treatments#1
  17. Boyer, Edward W.; Shannon, Michael (2005). "The Serotonin Syndrome". New England Journal of Medicine. 352 (11): 1112–20
  18. https://www.reddit.com/r/Drugs/comments/2sxvbd/best_benzo_for_a_come_down/
  19. GOV.UK, Controlled Substances, Retrieved from https://www.gov.uk/government/publications/controlled-drugs-list--2/list-of-most-commonly-encountered-drugs-currently-controlled-under-the-misuse-of-drugs-legislation, 01/02/2018
  20. Misuse of Drugs Act 1971. Retrieved from https://www.legislation.gov.uk/ukpga/1971/38/contents
  21. "List of psychotropic substances under international control"(PDF).
  22. UK Government, most commonly encountered illegal drugs, https://www.gov.uk/government/publications/controlled-drugs-list--2/list-of-most-commonly-encountered-drugs-currently-controlled-under-the-misuse-of-drugs-legislation
  23. "Clinical Pharmacology of SSRI's: Why Are CYP Enzymes Important When Considering SSRIs?
  24. Tatsumi M, Groshan K, Blakely RD, Richelson E (1997). "Pharmacological profile of antidepressants and related compounds at human monoamine transporters". Eur J Pharmacol.

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