From PsychonautWiki
Jump to navigation Jump to search

Skull and crossbones darktextred2.png

Death may result when opiates are combined with other depressants such as benzodiazepines, barbiturates, gabapentinoids, thienodiazepines, alcohol or other GABAergic substances.[1]

It is strongly discouraged to combine these substances, particularly in common to heavy doses.

Summary sheet: Buprenorphine
Chemical Nomenclature
Common names Buprenex, Subutex, Butrans, Cizdol, Addnok, Transtec
Systematic name (2S)-2-[(5R,6R,7R,14S)-9α-cyclopropylmethyl-4,5-epoxy-6,14-ethano-3-hydroxy-6-methoxymorphinan-7-yl]-3,3-dimethylbutan-2-ol
Class Membership
Psychoactive class Opioid
Chemical class Morphinan
Routes of Administration

WARNING: Always start with lower doses due to differences between individual body weight, tolerance, metabolism, and personal sensitivity. See responsible use section.

Bioavailability 30%[2]
Threshold <0.3 mg
Light 0.3 - 0.6 mg
Common 0.6 - 1.3 mg
Strong 1.3 - 2.4 mg
Heavy 2.4 mg +
Total 10 - 18 hours
Onset 40 - 80 minutes
Peak 4 - 8 hours
After effects 1 - 3 days
Bioavailability 48%[3]
Threshold < 0.2 mg
Light 0.2 - 0.4 mg
Common 0.4 - 0.8 mg
Strong 0.8 - 1.5 mg
Heavy 1.5 mg +
Total 8 - 14 hours
Onset 30 - 60 minutes
Peak 4 - 8 hours
After effects 1 - 3 days

DISCLAIMER: PW's dosage information is gathered from users and resources for educational purposes only. It is not a recommendation and should be verified with other sources for accuracy.


Buprenorphine is a semisynthetic opioid of the morphinan chemical class. It functions as a mixed partial agonist opioid receptor modulator.

At higher dosages, it is used to treat opioid addiction in opioid-dependent individuals. In lower dosages it is used to control moderate-acute pain in non-opioid-tolerant individuals and in even lower dosages it is used to control moderate chronic pain.


Buprenorphine is a semi-synthetic morphinan derivative of the opioid alkaloid thebaine. Like many opioids, such as codeine or hydrocodone, it is has a morphinan backbone.

Buprenorphine and other molecules of this class contain a polycyclic core of three benzene rings fused in a zig-zag pattern called phenanthrene. A fourth nitrogen containing ring is fused to the phenanthrene at R9 and R13. Buprenophine (along with other morphinans) contains an ether bridge between two of its rings, connecting the benzene and opposite cyclohexane ring through an oxygen group.

Buprenorphine is unique to human medical opioids as it contains an addition fused ring which connects to the lower cyclohexane ring at R6 and R14. This structure is called a endoethenotetrahydrooripavine backbone, often found in veterinarian opioids. It contains a hydroxy group (OH-) substituted on the benzene ring and a methoxy group bound to the lower cyclohexane ring. The backbone of buprenorphine is also substituted with a methyl cyclopropyl moeity on its amino group. Adjacent to its methoxy attachment, the cyclohexane ring is bonded to R2 of a 2-butanol chain.


Pill bottle-o.png

This pharmacology section is incomplete.

You can help by adding to it.

Buprenorphine acts as a partial agonist of the μ-opioid receptor with a binding affinity of K~i~ = 1.5 nM; it also acts as an antagonist of the κ-opioid receptor with a binding affinity of K~i~ = 2.5 nM and the δ-opioid receptor with a binding affinity of K~i~ = 6.1 nM.

Buprenorphine exerts its effects by binding to and activating the μ-opioid receptor. This occurs because opioids structurally mimic endogenous endorphins which are naturally found within the body and also work upon the μ-opioid receptor set. The way in which opioids structurally mimic these natural endorphins results in their euphoria, pain relief and anxiolytic effects. This is because endorphins are responsible for reducing pain, causing sleepiness, and feelings of pleasure. They can be released in response to pain, strenuous exercise, orgasm, or general excitement.

Subjective effects

The effects listed below are based upon the subjective effects index and personal experiences of PsychonautWiki contributors. These effects should be taken with a grain of salt and will rarely (if ever) occur all at once, but heavier doses will increase the chances of inducing a full range of effects. Likewise, adverse effects become much more likely on higher doses and may include serious injury or death.

Physical effects

Cognitive effects

Experience reports

There are currently no anecdotal reports which describe the effects of this compound within our experience index. Additional experience reports can be found here:

Toxicity and harm potential

Buprenorphine has a low toxicity relative to dose: the ceiling dose for buprenorphine is usually between 16mg and 32mg, and anything above this will not produce an increase in respiratory depression (the primary cause of death in opioid overdose is severe respiratory depression, leading to respiratory collapse). Thus increasing the dose of buprenorphine above this level will not continue to increase risk of death in a fashion similar to other μ-opioid receptor agonists. As with all opioids, long-term effects can vary but can include diminished libido, apathy and memory loss.

Buprenorphine is often sold under the brand name Suboxone, which also contains naloxone. Naloxone is not orally active except at higher doses, so when large amounts of Suboxone are taken, the naloxone takes effect and reverses the effects of the buprenorphine. This is done to deter abuse of Suboxone.

It is strongly recommended that one use harm reduction practices when using this drug.

Tolerance and addiction potential

As with other opioids, the chronic use of buprenorphine can be considered moderately addictive with a high potential for abuse and is capable of causing psychological dependence among certain users. When addiction has developed, cravings and withdrawal symptoms may occur if a person suddenly stops their usage.

Tolerance to many of the effects of buprenorphine develops with prolonged and repeated use. The rate at which this occurs develops at different rates for different effects, with tolerance to the constipation-inducing effects developing particularly slowly for instance. This results in users having to administer increasingly large doses to achieve the same effects. After that, it takes about 3 - 7 days for the tolerance to be reduced to half and 1 - 2 weeks to be back at baseline (in the absence of further consumption). Buprenorphine presents cross-tolerance with all other opioids, meaning that after the consumption of buprenorphine all opioids will have a reduced effect.

Precipitated withdrawal syndrome

Buprenorphine has the ability to precipitate withdrawal symptoms in opiate-dependent individuals. This is due to buprenorphine only being a partial agonist, which does not activate the receptor with the appreciable efficacy of a full agonist, as well as having a very high binding affinity for the μ-opioid receptor (Ki = 1.5nM), displacing other agonists that may still be attached when the buprenorphine is ingested.

Note: It is a common misconception that naloxone, in some buprenorphine formulations, is what causes the precipitated withdrawal syndrome to manifest. This is false, as naloxone has a lower binding than Buprenorphine, as well as being inactive through most routes of administration.

Dangerous interactions

Although many psychoactive substances are reasonably safe to use on their own, they can quickly become dangerous or even life-threatening when taken with other substances. The following lists some known dangerous combinations, but cannot be guaranteed to include all of them. Independent research should always be conducted to ensure that a combination of two or more substances is safe to consume. Some interactions listed have been sourced from TripSit.

  • Stimulants - It can be dangerous to combine depressants with stimulants due to the risk of accidental excessive intoxication. Stimulants mask the sedative effect of depressants, which is the main factor most people use to gauge their level of intoxication. Once the stimulant effects wear off, the effects of the depressant will significantly increase, leading to intensified disinhibition, motor control loss, and dangerous black-out states. This combination can also potentially result in severe dehydration if one's fluid intake is not closely monitored. If choosing to combine these substances, one should strictly limit themselves to a pre-set schedule of dosing only a certain amount per hour until a maximum threshold has been reached.



This legality section is a stub.

As such, it may contain incomplete or wrong information. You can help by expanding it.

  • European Union - Buprenorphine can be used either alone or in combination with another substance and is approved for the treatment of opioid addiction.[4]
  • Austria: Buprenorphine is legal for medical use under the AMG (Arzneimittelgesetz Österreich) and illegal when sold or possessed without a prescription under the SMG (Suchtmittelgesetz Österreich).[citation needed]
  • Germany: Buprenorphine is a controlled substance under Anlage III of the BtMG. It can only be prescribed on a narcotic prescription form.[5]
  • Netherlands - Buprenorphine a List II drug of the Opium Law, although special rules apply to its prescription and dispensation.[citation needed]
  • United States - Buprenorphine, either alone or in combination with naloxone (as, for example, Suboxone), is a Schedule III drug.
    • Prior to the approval of Suboxone in the U.S. for treating opioid addiction, the Drug Addiction Treatment Act of 2000 was passed. This law gives the Secretary of Health and Human Services the authority to grant a waiver to all physicians with appropriate training to prescribe and administer narcotics from Schedules III-V in the treatment of drug addiction. Prior to the passage of this law such authority was restricted solely to physicians working in an outpatient clinic specifically designed for treatment of addiction.[6] The waiver, which requires the physician to undergo an 8-hour training course, initially allowed that physician to treat only 10 patients in this manner; as of 2016, this limit has been increased to 275.[7]
  • Canada - Buprenorphine is a schedule I substance in Canada and is only available with a valid prescription. [8]

See also

External links