(2001), ‘The subjective effects of MDMA and mCPP in moderate MDMA users’, Drug and Alcohol Dependence, Volume 65, No 1, pp. 97–101. There are two positional isomers of mCPP, namely 1-(4-chlorophenyl)piperazine (also known as pCPP, para-CPP, 4CPP and 4Cl-PP) and 1-(2-chlorophenyl piperazine, (also known as oCPP, ortho-CPP, 2CPP and 2Cl-PP). Similar positional isomers occur with the other substituted phenylpiperazines. Dose–response effects of MDMA (left panel) and TFMPP (right panel) on the release of preloaded 3H5-HT from synaptosomes in vitro. Various concentrations of MDMA or TFMPP were incubated with or without the 5-HT uptake blocker fluoxetine (10 nM).
The Clinical Toxicology Of The Designer “party Pills” Benzylpiperazine And Trifluoromethylphenylpiperazine
The characteristic UV-VIS spectra are consistent with the standards of piperazine derivatives and confirm their presence in biological material. The kinetic parameters can be used to predict the clearance prior to human administration and for better understanding the mechanism of clearance in vivo. In this study, the metabolic activities of three major hepatic CYP isoforms (2C19, 2D6, and 3A4) were investigated on structurally different central nervous system (CNS) acting drugs, amitriptyline, fluphenazine, and dothiepin. By using our novel in vitro evaluation system, we could compare the kinetic parameters for the metabolism of fluphenazine and dothiepin for the first time. Comparing CL int values thus obtained, we concluded that 2C19 could be predominant for metabolic activity on tricyclic antidepressants as expected, but not on phenothiazine-related antipsychotic drugs. Since the metabolism of CNS drugs is susceptible to single nucleotide polymorphisms of human gene, our results suggest that phenothiazine could be an alternative to clinical application of CNS drugs.
All piperazine designer drugs can result in dangerous health problems 10,19,26,40. Even accidental ingestion can lead to severe poisoning or death 26,29,37. Commonly referred to as ‘legal highs’, new psychoactive substances (NPS) are synthetic or naturally occurring substances that mimic the effects of illegal drugs such as cannabis, amphetamines, and ecstasy.
Safer Using – Piperazines
It can be manufactured by reacting piperazine monohydrochloride with benzyl chloride. The latter precursor is readily available, and piperazine monohydrochloride is easily produced from the commercially-available salts. It is known that 1,4-dibenzylpiperazine (DBZP) can be formed as a side-product in this reaction. Piperazine derivatives are usually found in illicit dosage forms as either tablets or capsules, but loose powders also occur.
Other methods involve the reaction of m-chloroaniline with bis(2-chloroethyl)amine or the reaction of piperazine with m-dichlorobenzene. The other two isomers of CPP could be made in a similar way.It is unlikely that the mCPP found in illicit products has been synthesised in clandestine laboratories since it is available commercially as the base or as the hydrochloride salt. BZP has been available from retail chemical suppliers and there have been no reports of illicit synthesis.
Party Pills
According to animal studies, its effects are less potent than amphetamine, methamphetamine and MDMA 10. TFMPP, used in conjunction with BZP, has been reported to produce some of the effects of MDMA, but with a lower potency 11, while mCPP has been indicated to produce similar stimulant and hallucinogenic effects as MDMA 12. The presented methods enable the detection of piperazine designer drugs in a different concentration range and additionally in a short time of analysis. Rapid analytical confirmation of the cause of poisoning is essential in medical interventions that save human health and life. The proposed methods may be useful techniques in situations requiring analytical confirmation of piperazine designer drug poisoning and may be helpful in comprehensive toxicological diagnostics. The available literature and data indicate an increasing number and chemical diversity of new psychoactive substances (NPS), also known as designer drugs 1,2,3.
Additionally, the available immunoassays for known abused drugs cannot easily detect piperazines 11,16,17,62. Wherever circumstances indicate drug use, the positive and negative test results should be confirmed by other techniques, as observed in studies with amphetamines 71,72. Till now, various modern NPS detection methods, which use liquid chromatography (LC) or gas chromatography (GC), have been proposed 3,12,15,41,69,70,73,74,75,76,77,78.
Undesired Effects
To the best of our knowledge, the present findings with BZP are the first demonstration of DAT substrate activity for this compound. Our in vitro findings with TFMPP support previous data showing halogenated piperazines release endogenous 5-HT from rat brain tissue at doses ranging from 0.1 to 10 μM (Pettibone and Williams, 1984; Auerbach et al, 1990; Rothman and Baumann, 2002). Pettibone and Williams (1984) found that TFMPP and its chloro-substituted analog, 1-(m-chlorophenyl)piperazine (mCPP, see Figure 1), stimulate 5-HT release from hypothalamic slices by a mechanism involving SERTs but not calcium ions.
Classification
Management strategies are often limited to supportive and symptomatic care due to the limited published data on alternative treatment approaches. The purpose of this article is to offer health care providers, emergency medical personnel in particular, an awareness and understanding of the dangers related to some of the new psychoactive drugs of abuse. BZP is banned in several countries, including the USA, Republic of Ireland, Australia and New Zealand, but is available on a more or less restricted basis in many jurisdictions. A range of other piperazine derivatives have also been sold as ingredients in party pills, and many of these branded “proprietary blends” have subsequently been sold in countries around the world. The LC-MS method also confirmed the reproducibility of fragmentation for the tested compounds.
Types Of Drugs
- Although the extent of piperazine abuse is impossible to ascertain, the DEA has placed BZP and TFMPP into emergency Schedule I status based on the potential for imminent hazard to public safety (Department of Justice, 2002).
- People who use BZP or TFMPP usually lose interest in food and may stop eating altogether.
- BZP has no current human or veterinary pharmaceutical use in any country.
- We have shown previously that certain 5-HT-releasing agents are capable of elevating dialysate 5-HT levels more than 10-fold above baseline without any change in dialysate DA (Baumann et al, 2000, 2001).
Therefore, IC 50 values were also determined using testosterone hydroxylation as a probe reaction, specific for CYP3A4. The resulting values ranged from 6.13 to 15.85 µM, which places studied derivatives as moderate or weak inhibitors of CYP3A4. BZP and TFMPP are amphetamine-like recreational drugs and the major active components of ‘party pills’. The pharmacodynamic effects of these neurally active drugs are thought to be dependent on their activity at DA and 5-HT receptors and several studies report drug-drug interactions at a pharmacodynamic level. Their metabolism involves the hepatic P450 enzymes CYP2D6, CYP1A2 and CYP3A4 resulting in inhibited metabolism of other drugs and medicines, as well as compromised metabolism in poor metabolisers for CYP2D6. Basic pharmacokinetic properties are described for both BZP and TFMPP when taken alone and in combination.
MDBP shows a weak inhibition of serotonin reuptake and may cause slightly different effects compared to BZP 18. Large doses of MDBP are needed to achieve the perceptible effects in recreational use. Objectives ‘Party pills’ have found use worldwide as a substitute for amphetaminederived designer drugs.
The Risks
From the ethical as well as rational reasons, the selection of an appropriate system is crucial. Here, it is necessary to decide on the basis of expected CYP system involved. For CYP1A-mediated pathways, all the commonly used experimental models are appropriate except probably the dog. On the contrary, the dog seems to be suitable for modelling of processes depending on the CYP2D. With CYP2C, which is possibly the most large and complicated subfamily, the systems based on monkey (Maccacus rhesus) may be a good representative. Detailed studies on activities with individual isolated CYP forms are needed to understand in full all aspects of inter-species differences and variations.
Human subjects report that MDMA induces a pleasurable mix of stimulant-like and hallucinogen-like effects, coupled with feelings of increased emotional sensitivity and closeness to others (Vollenweider et al, 1998). The neurobiological mechanisms underlying psychoactive effects of MDMA seem to involve the release of 5-HT, and possibly DA, from nerve cells in the brain (Liechti and Vollenweider, 2001). At the molecular level, MDMA serves as a substrate for 5-HT transporters (SERTs) and DA transporters (DATs), thereby triggering nonexocytotic release of transmitter molecules from 5-HT and DA neurons (Green et al, 2003). BZP itself was initially developed as a potential antidepressant drug, but was found to have similar properties to amphetamine and therefore liable to abuse.
