Tapentadol - PsychonautWiki
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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: Tapentadol
Tapentadol
Tapentadol.svg
Chemical Nomenclature
Common names Tapentadol, Nucynta, Palexia, Yantil, Yantil SR
Systematic name 3-[(2R,3R)-1-(dimethylamino)-2-methylpentan-3-yl]phenol
Class Membership
Psychoactive class Opioid
Chemical class Phenol
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.



Oral
Dosage
Threshold 12.5 - 25 mg
Light 25 - 50 mg
Common 50 - 75 mg
Strong 75 - 150 mg
Heavy 150 mg +
Duration
Onset 15 - 45 minutes
Peak 4 - 6 hours
After effects 1 - 6 hours









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.

Interactions
Amphetamines
MAOIs
Nitrous
PCP
MAOIs
Serotonin releasers
Selective serotonin re-uptake inhibitors
Serotonin-norepinephrine reuptake inhibitors
5-HTP
Alcohol
Benzodiazepines
Cocaine
DXM
GHB/GBL
Ketamine
MXE
Tramadol


Tapentadol often sold under the brand name Nucynta is a synthetic opioid analgesic similar in structure to tramadol. Tapentadol has a duel mechanism of action, working on both the μ-opioid receptor and also acting as a norepinephrine reuptake inhibitor. Tapentadol is used in the management of moderate to severe pain. The subjective effects of tapentadol are similar to those of tramadol. Many users report extreme pain when trying to insufflate tapentadol.

Contents

Chemistry

 

This chemistry section is incomplete.

You can help by adding to it.

Tapentadol is similar in structure to both tramadol and dextropropoxyphene. Tapentadol has one cyclic ring, unlike tramadol which has two. The empirical formula of tapentadol is C14H23NO and has a molar mass of 221.339 grams per mole.[2]

Pharmacology

Opioids exert their 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. Tapentadol has an oral bioavailability of about 32%. Tapentadol is metabolized by the Cytochrome P450 system in the liver and is excreted by the kidneys in urine as well as in feces.

Unlike most opioids, tapentadol is also a norepinephrine reuptake inhibitor and also has weak serotonergic effects as well.[3]

Subjective effects

Disclaimer: The effects listed below are taken from the subjective effect index, which is based on anecdotal reports and the personal experiences of PsychonautWiki contributors. As a result, they should be treated with a healthy degree of skepticism. It is worth noting that these effects will rarely (if ever) occur all at once, although higher 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

Tapentadol has a low toxicity relative to dose. As with all opioids, long-term effects can vary but can include diminished libido, apathy and memory loss. It is also potentially lethal when mixed with depressants like alcohol or benzodiazepines and generally has a wider range of substances which it is dangerous to combine with in comparison to other opioids. Tapentadol is known to lower the seizure threshold. It should not be taken during benzodiazepine withdrawals as this can potentially cause seizures.

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 tapentadol 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 tapentadol 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). Tapentadol presents cross-tolerance with all other opioids, meaning that after the consumption of tapentadol all opioids will have a reduced effect.

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.

  • Alcohol - Both substances potentiate the ataxia and sedation caused by the other and can lead to unexpected loss of consciousness at high doses. Place affected patients in the recovery position to prevent vomit aspiration from excess. Memory blackouts are likely
  • Amphetamines - Stimulants increase respiration rate which allows for a higher dose of opiates than would otherwise be used. If the stimulant wears off first then the opiate may overcome the user and cause respiratory arrest.
  • Benzodiazepines - Central nervous system and/or respiratory-depressant effects may be additively or synergistically present. The two substances potentiate each other strongly and unpredictably, very rapidly leading to unconsciousness. While unconscious, vomit aspiration is a risk if not placed in the recovery position blackouts/memory loss likely.
  • Cocaine - Stimulants increase respiration rate which allows for a higher dose of opiates than would otherwise be used. If the stimulant wears off first then the opiate may overcome the patient and cause respiratory arrest.
  • DXM - CNS depression, difficult breathing, heart issues, hepatoxic, just very unsafe combination all around. Additionally if one takes DXM, their tolerance of opiates goes down slightly, thus causing additional synergistic effects.
  • GHB/GBL - The two substances potentiate each other strongly and unpredictably, very rapidly leading to unconsciousness. While unconscious, vomit aspiration is a risk if not placed in the recovery position
  • Ketamine - Both substances bring a risk of vomiting and unconsciousness. If the user falls unconscious while under the influence there is a severe risk of vomit aspiration if they are not placed in the recovery position.
  • MAOIs - Coadministration of monoamine oxidase inhibitors (MAOIs) with certain opioids has been associated with rare reports of severe and fatal adverse reactions. There appear to be two types of interaction, an excitatory and a depressive one. Symptoms of the excitatory reaction may include agitation, headache, diaphoresis, hyperpyrexia, flushing, shivering, myoclonus, rigidity, tremor, diarrhea, hypertension, tachycardia, seizures, and coma. Death has occurred in some cases.
  • MXE - This combination can potentiate the effects of the opioid
  • Nitrous - Both substances potentiate the ataxia and sedation caused by the other and can lead to unexpected loss of consciousness at high doses. While unconscious, vomit aspiration is a risk if not placed in the recovery position. Memory blackouts are likely.
  • PCP - PCP can reduce opioid tolerance, increasing the risk of overdose.
  • Tramadol - Concomitant use of tramadol increases the seizure risk in patients taking other opioids. These agents are often individually epileptogenic and may have additive effects on seizure threshold during coadministration. Central nervous system- and/or respiratory-depressant effects may be additively or synergistically present

Serotonin syndrome risk

Combinations with the following substances can cause dangerously high serotonin levels. Serotonin syndrome requires immediate medical attention and can be fatal if left untreated.

Legal issues

 

This legality section is a stub.

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

  • Germany: Tapentadol is a controlled substance under Anlage III of the BtMG. It can only be prescribed on a narcotic prescription form.[5]
  • United Kingdom: Tapentadol is a Class A, Schedule 2 drug in the United Kingdom.[6]
  • United States: Tapentadol is a Schedule II Controlled Substance.[7]

See also

External links

References