Review on Abuse Drugs used in Athlete

Drug abuse is described as “the use of illicit drugs or the abuse of prescription or over-the-counter drugs for purposes other than those for which they are indicated or in a manner or in quantities other than directed” in Medline's medical encyclopedia. “The harmful use of any substance” for the intention of modifying mood is considered substance Abuse. In accordance with The World Health Organization (WHO) defined substance abuse as “the harmful or hazardous use of psychoactive substances, including alcohol and illicit drugs” (1).

Drug abuse occurs in all sports and at most levels of competition. Drug abuse in the athlete inhabitants may involve doping in an effort to acquire a competitive advantage. Alternatively, as athletes can acquire substance use disorders just like any non-athlete, it could involve using drugs like alcohol or marijuana without the intention of strengthening performance (2). Doping, which is defined as using drugs or other substances to meliorate performance, has become a significant issue in almost every athlete of various ages and competitive levels exhibit sport citation (3,4). Athletes who consume drugs may dope in an attempt to obtain a competitive edge (2). Essentially, performance-enhancing drugs (PEDs) encompass not only illicit substances but also prescription pharmaceuticals, including anabolic steroids (5). These consist of a range of substances and dietary supplements that may be purchased online and at grocery and health food stores (6). The results of this study showed that most of drug users were male which is predictable due to social and cultural situation in Iran and this fact that women refer to these centres less than men (7). In sport—understood as a set of motor situations codified in the form of competition, and institutionalized athletes use ergogenic aids (any nutritional, physical, mechanical, psychological, or pharmacological maneuver or method) in order to increase their ability to perform physical work and improve performance (8).

Both the general public and athletes have seen an upsurge in the sale and use of supplements. A research of 3168 troops in the British Royal Army revealed a supplement use rate of 38% during the time of the survey, which increased to 54% when the use of supplements was compared to the 12 months (1 year) before to the study (9). Protein powders and bars (66%), isotonic sports drinks (49%), creatine (38%), recovery drinks (35%), multivitamins (31%), and vitamin C (25%) were the most merchantable (marketable) supplements. A total of 6523 supplements were consumed by the 3887 athletes in Tscholl et al.’s study (1.7 per athlete) (10). In athletics, dietary supplements, often referred to as ergo nutritional aids, have been utilized since the Olympic Games; however, there has recently been a significant rise in their use among specific demographic groups (11). An example of contamination with doping substances is reported in a study by Geyer et al. (2003), in which 94 out of 634 dietary supplements examined (14.8%) were found to contain prohormones that were not listed on the product labels (12). A more recent study by Judkins et al. found that out of the 58 supplements examined, 25% had low amounts of contaminating steroids, and 11% were tainted with stimulants (13). Numerous doping drugs really improve performance, according to a body of studies. However, there isn't much evidence to support the efficacy of several drugs used to improve performance, such as selective androgen receptor modulators, anti-estrogens, and aromatase inhibitors (14).

The use of drugs and supplements in sport has increased noticeably in recent years, raising concerns about athlete health and fair competition. Athletes may use substances either to enhance performance or for reasons unrelated to sport, similar to the general population. The easy availability of performance-enhancing drugs and dietary supplements has made substance use more common across all levels of sport. Many supplements are poorly regulated, and some have been shown to contain banned or harmful substances without proper labelling. This creates a risk of unintentional doping and serious health consequences for athletes. Social and cultural factors also influence patterns of drug use and access to treatment, particularly among male and female athletes. Despite their widespread use, the effectiveness of many performance-enhancing substances remains scientifically uncertain. Limited awareness of risks and misinformation further contribute to misuse. Understanding the extent and nature of drug abuse in sport is essential for protecting athlete well-being. Examining current evidence can help identify gaps in knowledge and prevention strategies. This article aims to highlight key issues related to substance abuse, doping, and supplement use in athletes. The findings may support better education, policy development, and ethical practices in sport.

The Risk of Contaminated Supplements in Sport: 

Included among the substances present, but not mentioned, on the label are prohormones, anabolic steroids, cognitive enhancers, and 1,3-dimethylamylamine. All of these are prohibited by the World Anti-Doping Agency (WADA) and would cause a positive result on an anti-doping test in athletes who consume them. Several studies examined the occurrence of contaminants in human subjects following the intake of tainted supplements or ergo nutritional products; in other research, the products were analyzed directly (15).

Performance-enhancing effects of substances used by athletes 

ANDROGENS: 

Androgens include exogenous testosterone, synthetic androgens (e.g., danazol, nandrolone, stanozolol), androgen precursors (e.g., androstenedione, dehydroepiandrosterone), selective androgen receptor modulators, and other types of androgen stimulation. Athletes have utilized the latter types of chemicals to boost endogenous testosterone in an attempt to avoid WADA's restriction on natural or synthetic androgens¹⁶. Dehydroepiandrosterone (DHEA) and androstenedione are examples of androgen precursors. We couldn't find any proof that androstenedione makes muscles stronger¹⁷. Exogenous human chorionic gonadotropin, antiestrogens like tamoxifen, clomiphene, and raloxifene, and aromatase inhibitors like testolactone, letrozole, and anastrozole are further methods of androgen stimulation. Serum testosterone levels may rise as a result of certain drugs¹⁸.

ADVERSE EFFECTS:

1.  Decreased fertility 

2. Prostate cancer 

3. Depression 

4. Mania 

5. Amenorrhea in women 

6. Hepatotoxicity (19)

STIMULANTS: 

According to research, Stimulants are used to improved anaerobic performance, less tiredness, improved response time, increased alertness, improved endurance, and cause weight loss²⁰. Notably, there has been a noticeable rise in the number of athletes who have been found to use stimulant medicines in recent years, particularly at the highest levels of competition²¹. 61 men were randomly assigned to five different dosages of testosterone enanthate, ranging from 25 mg to 600 mg, as well as therapy with a gonadotropin-releasing hormone agonist to decrease endogenous testosterone release, in another double-blind study of exogenous testosterone. Similar to the previous trial, that one showed a dose-dependent increase in leg power and leg press strength that was connected with serum total testosterone concentrations²². A wide range of stimulants and other chemicals, such as caffeine, the amino acids taurine and L-carnitine, glucuronolactone, ginkgo biloba, ginseng, and others, are now frequently included in energy drinks²³.

• Caffeine: The consumption of caffeine is rising more and more globally. The primary underlining motives are improving physical performance and improving focus and memory²⁴.

COMPLICATIONS:

1. Hypertension 

2. Tachycardia 

3. Myocardial infarction 

4. Stroke 

5. Weight loss 

6.  Anxiety/Panic attacks (25).

INSULIN:                  

Insulin increases the amount of glucose transporters (Glut-4) at the cell membrane, which increases the flow of glucose into the cell's interior and promotes the uptake of glucose into muscle and fat (26). Since insulin is a powerful hormone that promotes the absorption of glucose and the subsequent store of glycogen in muscle, using it should allow for longer periods of exercise. Exercise duration should increase with the amount of glycogen stored in the body for better performance (27). 

ADVERSE EFFECTS:

• Hypoglycemia is the primary adverse effect and the most noticeable. When injecting fast-acting insulin analogs, the majority of athletes who misuse insulin are probably skilled at controlling their carbohydrate intake.
• Despite being easily accessible, a large portion of insulin use is probably secret, even from friends and relatives.
• When young, healthy, non-diabetic people arrive for medical assessment in a state of disorientation or coma, it is rare that they will be diagnosed with hypoglycemia.
• That might be a deadly error(28) .

Erythropoietin (EPO):

The primary regulator of erythropoiesis is the hormone EPO, a circulating glycosylated protein. It is mostly generated by the kidney and is inversely correlated with blood oxygen levels. After rHuEPO is administered to rats and humans, there is a direct correlation between elevated hemoglobin levels and improved performance. Hypoxia and hypoxia-mimetics are doping techniques. Training at altitude is one such technique; but, due to hypoxic-mediated exhaustion, one may not be able to exercise as vigorously as at lower altitudes. There are variations on this subject, such as sleeping in a tent or chamber with reduced oxygen tension (at lower altitude) and training at the same elevation, or living at altitude and training at sea level. These techniques are not regarded as doping²⁹.

ADVERSE EFFECTS:

• Changes in blood flow characteristics as the hematocrit increases have been directly connected to deaths in professional cyclists.
• Although rHuEPO and its associated proteins have not been studied in child or adolescent athletes, theoretically, the reactions should be identical to those of older adolescents or young adults.
• The main problems are related to pulmonary emboli, slow blood flow in the tiny capillaries of vital organs, and elevated hematocrit (30).

ANABOLIC STERIODS:

A sex hormone that encourages the development and maintenance of male sex traits is called an anabolic steroid. The main androgen that males secrete is testosterone. Androgens have both anabolic (an increase in skeletal muscle mass and strength) and masculinizing (the development of masculine secondary sex traits, such as hair growth) effects. Pharmaceutical firms have been trying to create androgens with selective anabolic action and little to no androgenic activity for decades; these substances are known as anabolic steroids. Testosterone is mostly attached to sex-hormone binding globulin (SHBG), loosely associated with albumin, although a minor fraction exists as the unbound hormone. It is believed that the loosely bound (albumin-bound) and free fractions contain the biological activity (31). Muscle fibers enlarge (32) as a result of testosterone. and a rise in the quantity of satellite cells and myonuclei (33).

AFTER EFFECTS:

• Nevertheless, because testosterone is a precursor to estrogens, the long bones' epiphyseal development will be accelerated, and the adult stature will be lower than expected. Even very low dosages of anabolic steroids can cause hirsutism and irregular menstruation and ovarian cycles in women and girls (34).

CONSUMPTION AND CONTAMINATION OF ERGONUTRITIONAL SUPPLEMENTS:

• Because phosphodiesterase-5 inhibitors have vasodilatory effects, athletes may also use them to try to boost oxygenation and exercise capacity(35).
• Depending on the sport, up to 90% of athletes may utilize them (36).

• Most athletes include the use of these supplements in their daily routines, but before consuming any kind of dietary supplement, they should be fully certain of its safety and effectiveness as well as its precise composition. The information presented by certain research is significant; for example, in samples examined between 2002 and 2005, the percentage of contamination in ergonutritional supplements ranged from 12% to 58%, and in 216 instances, hormones were discovered in dietary supplements that shouldn't have had them (37).
• According to a survey of 567 Canadian athletes aged 11 to 25, 28% of them use supplements everyday with the primary objective of increasing their intake of vitamins and minerals and enhancing their performance (38).
• Another research that included 292 Portuguese athletes from 13 different federations revealed a 66% consumption rate, with an average of four supplements per athlete. The primary motivations for use were improved performance (62%) and accelerated recuperation (63%) (39).
• The first research on the quality of nutritional supplements was conducted in 2000, when the issues brought on by accidental doping started to gain attention (40).
• Numerous studies have shown that the contamination rate from labeling errors—whether from the omission of compounds contained in the product or from mistakes in the estimation of the concentrations—is comparatively high (41).
• Diuretics, probenecid, 5-alpha reductase inhibitors, epitestosterone (to normalize urine testosterone to epitestosterone ratios), and plasma expanders (e.g., glycerol, intravenous administration of albumin, dextra, and mannitol) are examples of masking agents that generally hide prohibited substances in urine or other body samples(42).

DOPING TEST IN ATHLETES:

Doping testing is not only done to get positive results, which provide analytical proof of the use of illegal drugs or techniques. Even if the techniques for analyzing biological samples from athletes are constantly evolving (43) testing itself still has a number of drawbacks when it comes to revealing doping, such as a restricted detection window, low test sensitivity for specific compounds, and high test predictability (44). Such a hypothetical scheme would not only be financially feasible, but it would also be morally dubious. It has been stated that the worldwide testing program is mostly predicated on discouraging athletes from choosing to dope by threatening them with detection and harsh penalties, given the challenges of the detection-based method (45).

Doping, a phrase that initially referred to the use of drug stimulants to enhance athletes' performance, has expanded to include all illegal narcotics (46). Doping control analysis is now a standard method used to guarantee sports' justice and fairness (47). The two primary forms of doping that exist today are drug doping and gene doping, which are based on the various methods that illegal substances might enter athletes (48). Gene doping is the use of drugs or technologies to introduce alien genes or cells into athletes for nontherapeutic purposes in an attempt to improperly enhance their sports performance (48). Genetic modification technologies are become more sophisticated as science and technology continue to advance. Consequently, doping techniques and varieties have grown increasingly intricate, including the most modern kind, gene doping (49).

DRUG DOPING DETECTION:

• FLUROSCENCE METHOD:

Cheng's team successfully developed a unique fluorescence technique to detect drug doping with methamphetamine hydrochloride by using fluorescent covalent polymers (CPs) as the signal carrier travel. Quantitative fluorescence quenching of CPs was made possible by the intrinsic interactions between the target molecules and signal probes, demonstrating the method's exceptional performance (50). However, sensors that rely on this "signal-off" method are susceptible to interference from many sources or unknown media. As a result, scientists have created several "signal-on" fluorescence sensors for detection of doping. Hof's research team, for instance, described a method for developing a family of self-assembling dimeric supramolecular chemosensors that is powered by parallel synthesis. "Signal-on" fluorescence detection of drug doping is made possible by the functional unit dimer-dyes, which allow the sensors to emit fluorescence when they detect micromolar amounts of a variety of illegal substances in saliva and water (51).

• ELECTROANALYTICAL METHOD:

Electroanalytical procedures are highly sensitive, just like fluorescence approaches.

As a result, throughout the past ten years, they have been extensively utilized in the anti-doping area, particularly for certain doping substances or associated metabolites with electrochemical activity (52). Simple, quick, inexpensive, and user-friendly, these techniques have been gaining popularity. They also offer minimal matrix effects and the potential to employ portable electrochemical devices and reduce the size of the experimental setup (53). Furthermore, electrochemical analytical techniques are consistently at the forefront of the doping control analysis area due to their perceived adequate sensitivity, precision, and accuracy (54).

Because sodium dodecyl sulfate, an auxiliary reagent, was included, the produced electrochemical sensors demonstrated exceptional interference resistance. Additionally, the new technique was used on synthetic samples, and its accuracy was assessed by comparing it to liquid chromatography using a diode array detector as the reference method (55).

METHODOLOGY:

A narrative literature review technique was used to compile and examine the body of knowledge about drug misuse and doping in sports for this review paper. From reputable electronic sources including PubMed, Google Scholar, and Scopus, pertinent scientific material was gathered. These databases were chosen because they offer a variety of peer-reviewed research papers, reviews, and scientific reports pertaining to public health, pharmacology, and sports medicine. A number of keywords and search terms, such as "drug abuse in athletes," "performance-enhancing drugs," "doping in sports," "anabolic steroids," "erythropoietin," "stimulants," "insulin misuse," "dietary supplements," and "doping detection methods," were used to find relevant papers. English-language publications published in peer-reviewed journals, together with pertinent reviews and reports, were the main focus of the search. To make sure the data in the evaluation was correct and current, official guidelines and reports from international organizations like the World Health Organization and the World Anti-Doping Agency were also reviewed in addition to scholarly publications.

The study covered studies on the incidence of drug addiction, performance-enhancing substance kinds, dietary supplement contamination, health effects, and doping detection methods. Articles unrelated to athletes or athletic performance were not included. Following the collection of pertinent research, the data was meticulously examined, arranged, and summarized to highlight important conclusions about substance abuse, its consequences on health, and contemporary anti-doping tactics in sports. This approach made it possible to present a thorough summary of the data on drug usage and doping among athletes.

REFERENCES

1. Mahanta P. ; ‘‟, , pp. ,. Subst Abus its medico-legal considerations. Journal of:7–12.
2. MorseED. : Subst use athletesBaronDAReardonCLBaronSHClinical Sport Psychiatry. 2013;An Interna.
3. Baron DA, Martin DM AMS. : ;6:. [PMC free article] [PubMed] [Google Scholar]. Doping Sport its spread to at-risk Popul. 2007;an interna:118–123.
4. Catlin DH MT. PJAMA. ;1–237. [PubM276:23ed] [Google Scholar]. erformance-enhancing drugs, fair Compet Olympic Sport. 1996;237.
5. Wanjek B, Rosendahl J, Strauss B GH. prevalence, knowledge and attitudes. Int J Sports Med. ; 28:. doi: Doping, drugs drug Abus among Adolesc State Thuringia. 2007;346–353.
6. Botre F PA. 20:. doi: Enhanc drugs athlete Phys Med Rehabil Clin N Am. 2009;133–148.
7. Heidari H, Sharif Malmir M, Kamran A BN. J Health Syst Res ; 8: Comp Causes Drug Abus from Viewp Addicted Patients Their Fam. 2013;1017-1026.
8. Gil-Antuñano N.P., Bonafonte L.F., Marqueta P.M., Manuz B. G. J.A.V. Consenso sobre bebidas para el deportista. Composicióny pautas de reposición de liquidos. Arch. Med. Deporte. ; 25: 2008;245–258.
9. Casey A., Hughes J., Izard R.M. GJP. 112:. doi: Suppl use by UK-based Br Army soldiers training Br J Nutr. 2014;1175–1184.
10. Tscholl P., Alonso J.M., Dolle G., Junge A. DJ. Am.. ; 38:. doi: use drugs Nutr Suppl top-level track F athletes. 2010;J. Sports:133–140.
11. T.C. W. J. Nutr. 145:. Twenty Years Diet Suppl Heal Educ Act—How Should Diet Suppl Be Regul. 2015;1683–1686.
12. Geyer H., Parr M.K., Mareck U., Reinhart U., Schrader Y. SW. ; 25:. Anal non-hormonal Nutr Suppl Anab steroids—. 2004;Results of:124–129.
13. Judkins C.M.G., Teale P. HD. . . ; 2:. role banned Subst residue Anal Control Diet Suppl Contam. 2010;Drug Test.:417–420.
14. W V. . ; Break Chain London,. 1999;UK: Random.
15. Goel D.P., Geiger J.D., Shan J.J., Kriellaars D. PGN. .; 14: Doping-control Urin a ginseng Extr Cold-FX, athletes. 2004;Int. J. Sp:473–480.
16. Reardon CL CS. Aug 14;5: Drug Abus athletes Subst Abus Rehabil. 2014;95-105.
17. Wallace MB, Lim J, Cutler A BL. ;31:. [DOI] [PubMed] [Google Scholar]. Eff dehydroepiandrosterone vs androstenedione Suppl men. 1999;Med Sci Sp:1788–1792.
18. DJ. H. Clinical review: . ;91:[DOI] [PubMed] [Google Scholar]. Ration banning Hum chorionic gonadotropin estrogen blockers Sport. 2006;J Clin End:1646–1653.
19. Koshy KM, Griswold E SE. ;340:. . [DOI] [PubMed] [Google Scholar]. Interstitial nephritis a patient Tak Creat N Engl. 1999;J Med.:814–815.
20. ER. E. . ;7:. [DOI] [PubMed] [Google Scholar]. Stimul Sport Curr Sport Med Rep. 2008;244–245.
21. Treatment NCAAN guidelines to document A. with banned stimulant medications. Addendum to the Jan 2009 guideline. [Accessed June 12, 2014]. Available from: 2010;
22. Storer TW, Magliano L WL. et al. ;88:. doi: [DOI] [PubMed] [Google Scholar]. Testosterone dose-dependently increases maximal Volunt strength leg power, but does not Affect fatigability or Specif Tens. 2003; J Clin E:1478–1485.
23. Higgins P, Tuttle TD HC. . . ;85:. [DOI] [PMC free article] [PubMed] [Google Scholar]. Energy beverages content safety Mayo Clin Proc. 2010;1033–1041.
24. Cappelletti, S., Daria, P., Sani, G., & Aromatario M. (). Current neuropharmacology, 13(1), . Caffeine Cogn Phys Perform Enhanc or Psychoact drug? 2015;71–88.
25. Edmunds JW, Jayapalan S, DiMarco NM, Saboorian MH AH. SPRD-cy rats. Am J Kidney Dis.;37:73–78. . [DOI] [PubMed] [Google Scholar]. Creat Suppl increases Ren Dis Progress Han. 2001;
26. AD R. . . . Feb 18;36:19. PMID: 20167068; PMCID: PMC2830221. Drugs Abus Adolesc Athl. 2010;Ital J Ped.
27. Williams CPI. . Glucose homeostasis and hypoglycaemia; pp. . [Google Scholar]. Textb Endocrinol 11. 2008;Kronenberg:1503–1534.
28. Thevis M, Thomas A SWI. ;195:. [DOI] [PubMed] [Google Scholar. Handb Exp Pharmacol. 2009;209–26.
29. S. E. ;154:. doi: . [DOI] [PMC free article] [PubMed] [Google Scholar. Erythropoiesis-stimulating agents other methods to Enhanc Oxyg Transp. 2008;Brit J Pha:529–41.
30. Bidlingmaier M, Wu Z SC. . In: . Measurement of Peptide hormones; pp. [Google Scholar]. Endocr Syst Sport Exerc Collab with Int Fed Sport Med Kraemer WJ,. 2005;Rogol AD,:36–46.
31. Hoffman JR, Kraemer WJ, Bhassin S, Storer T, Ratamess NA, Haff G, Willoughby DS RA. ;23(5 Supp):S1–S59. [DOI] [PubMed] [Google Scholar]. Position stand Androg Hum growth Horm use (National Strength Cond Assoc. 2009;J Strength.
32. Spiering BA, Kraemer WJ, Vingren JL, Ratamess NA, Anderson JM, Armstrong LE, Nindl BC, Volek JS, Häkkinen K MC. . ;114:. doi: [DOI] [PubMed] [Google Scholar. Elev Endog testosterone Conc potentiate muscle Androg Recept responses to Resist Exerc. 2009;J Steroid:195–9.
33. Takeda H, Chodak G, Mutchnik S, Nakamoto T CC. . . ;126:17–25. [DOI] [PubMed] [Google Scholar]. Immunohistochem localization Androg Recept with mono- polyclonal antibodies to Androg Recept. 1990;J Endocrin.
34. AD. R. Feb 18;36:19. PMID: 20167068; PMCID: PMC2830221. Drugs Abus Adolesc athlete. 2010;Ital J edi.
35. Petroczi A ND. ;7:25. [DOI] [PMC free article] [PubMed] [Google Scholar]. Potential Fatal new trend Perform Enhanc a cautionary note nitrate. 2010;J Int Soc.
36. Baume N., Mahler N., Kamber M., Mangin P. SM. ;16:. doi: [DOI] [PubMed] [Google Scholar]. Res Stimul Anab steroids Diet Suppl Scand. 2006;J. Med. Sc:41–48.
37. Van Poucke C., Detavernier C., Van Cauwenberghe R. VPC. Chim. Acta. ;586: [DOI] [PubMed] [Google Scholar]. Determ Anab steroids Diet Suppl by Liq Chromatogr mass Spectrom Anal. 2007;35–42.
38. Monakhova Y.B., Ilse M., Hengen J., El-Atma O., Kuballa T., Kohl-Himmelseher M. LDW. ;6:. doi: [DOI] [PubMed] [Google Scholar]. Rapid Assess illegal presence 1,3-dimethylamylamine Sport Nutr Diet Suppl using 1H NMR Spectrosc. 2014;Drug Test:944–948.
39. Striegel H., Vollkommer G., Horstmann T. NAM. : ;23:. [DOI] [PubMed] [Google Scholar]. Contam Nutr Suppl Prot Elit athletes who Test Posit. 2005;A case rep:723–726.
40. Stewart B. OSS. . ACT. : ;23:e361–e372.. [DOI] [PubMed] [Google Scholar]. Doing Suppl to Improv Perform club Cycl. 2013;A life-cou.
41. Bird S.R., Goebel C., Burke L.M. GRF. . . ;53:. [DOI] [PubMed] [Google Scholar]. Doping Sport Exerc Anab ergogenic, Heal Clin issues. 2016;Ann. Clin.:196–221.
42. Code WADATWAD. : . . [Accessed August 23, 2013]. Available from: -Prohibited-List-2013-EN.pdf. 2013 Prohibited List Int Stand. 2013;
43. Thevis M, Piper T TA. . . () 205:114312. Recent Adv identifying Util Metab Sel doping agents Hum Sport drug Test. 2021;J Pharm Bi.
44. Hermann A HM. . () 4(5):. Anti-doping Syst Sport are doomed to Fail a Probab cost Anal. 2014;J Sports M:1–12.
45. LD B. .. . . () 60(10):. Counterpoint quest clean Compet Sport deterrence role Detect. 2014;Clin Chem:1279–81.
46. Lu, Y., Yan, J., Ou, G., & Fu L. . ().. Molecules, 28. A Rev Recent Prog Drug Doping Gene Doping Control Anal. 2023;
47. Polet, M.; Van Gansbeke, W.; Van Eenoo P. . . , 1042, [CrossRef]51. Dev Valid an open Screen method doping Subst Urin by gas Chromatogr quadrupole time-of-flight mass Spectrom. 2018;Anal. Chim:52–59.
48. Tozaki, T.; Ohnuma, A.; Iwai, S.; Kikuchi, M.; Ishige, T.; Kakoi, H.; Hirota, K.; Kusano, K.; Nagata S. . [CrossRef]. Robustness Digit PCR Real-Time PCR Transgene Detect Gene-Doping Control Anal Chem 2021, 93,. :7133–7139.
49. Passreiter, A.; Thomas, A.; Grogna, N.; Delahaut, P.; Thevis M. /, 92, [CrossRef]. First Steps Towar Uncovering Gene Doping with Cris by Identifying SpCas9 Plasma via HPLC-HRMS. 2020;MS. Anal.:16322–16328.
50. Fu, Y.; Shi, L.; Zhu, D.; He, C.; Wen, D.; He, Q.; Cao, H.; Cheng J. , 180, . [CrossRef]. Fluorene–thiophene-based thin-film Fluoresc Chemosens methamphetamine Vap by thiophene–amine Interact. 2013;Sens. Actu:2–7.
51. Beatty, M.A.; Selinger, A.J.; Li, Y.; Hof F. . , 141, [CrossRef]. Parallel Synth Screen Supramol Chemosens that Achieve Fluoresc Turn-on Detect Drugs Saliva. 2019;J. Am. Che:16763–16771.
52. dosSantos, W.T.P.; Compton R. . . , 285, . [CrossRef]. A simple method to Detect Stimul modafinil authentic saliva using a carbon-nanotube screen-printed electrode with Adsorpt stripping voltammetry. 2019;Sens. Actu:137–144.
53. Li, C.; Han, D.; Wu, Z.; Liang, Z.; Han, F.; Chen, K.; Fu, W.; Han, D.; Wang, Y.; Niu L. . Analyst , 147, [CrossRef] [PubMed]. Polydopamine-based Mol imprinted Electrochem Sens highly Sel Determ ecstasy components. 2022;3291–3297.
54. Hasso, M.; Sarakhman, O.; Stankovic, D.M.; Svorc L. . Anal. Methods , 12, . [CrossRef]. A new voltammetric Platf Reliab Determ Sport performance-enhancing Stimul synephrine Diet Suppl using a boron-doped Diam electrode. 2020;4749–4758.
55. Rocha, L.R.; de Cássica Mendonça, J.; Boareto Capelari, T.; Antigo Medeiros, R.; Teixeira Tarley C. . S, 310, 127812. Dev a Reliab Sel voltammetric method Determ Des drug 1-(3-chlorophenyl)piperazine using boron-doped Diam electrode Exploit surfactant-mediated Meas. 2020;ens. Actua.